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<link:definition>1003 - Statement - Consolidated Statements of Profit/Loss and Other Comprehensive Income/Loss (Parenthetical)</link:definition>
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<link:definition>1004 - Statement - Consolidated Statements of Financial Position</link:definition>
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<link:definition>1005 - Statement - Consolidated Statements of Changes In Equity</link:definition>
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<link:definition>1006 - Statement - Consolidated Statements of Cash Flows</link:definition>
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<link:definition>1007 - Disclosure - General Information</link:definition>
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<link:definition>1008 - Disclosure - Basis of Accounting</link:definition>
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<link:definition>1009 - Disclosure - Impacts to the consolidated financial statements due to Covid-19 pandemic</link:definition>
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<link:definition>1010 - Disclosure - Basis of Consolidation and Accounting Policies</link:definition>
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<link:usedOn>link:calculationLink</link:usedOn>
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<link:definition>1011 - Disclosure - Material judgments, estimates and assumptions</link:definition>
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<link:roleType roleURI="http://myn.com/role/SegmentReportingAndInformationOnGeographicalAreas" id="SegmentReportingAndInformationOnGeographicalAreas">
<link:definition>1012 - Disclosure - Segment reporting and information on geographical areas</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:definition>1013 - Disclosure - Revenue</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:definition>1014 - Disclosure - Other operating income</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/CostOfMaterials" id="CostOfMaterials">
<link:definition>1015 - Disclosure - Cost of materials</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:definition>1016 - Disclosure - Personnel costs</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:definition>1017 - Disclosure - Amortization and Depreciation</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:definition>1018 - Disclosure - Other Operating Costs</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:definition>1019 - Disclosure - Changes in Inventories of Finished Goods and Work in Progress</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:definition>1020 - Disclosure - Own Work Capitalized</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:definition>1021 - Disclosure - Net Finance Costs</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:definition>1022 - Disclosure - Income Taxes</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/EarningsPerShare" id="EarningsPerShare">
<link:definition>1023 - Disclosure - Earnings per Share</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/IntangibleAssets" id="IntangibleAssets">
<link:definition>1024 - Disclosure - Intangible Assets</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/PropertyPlantAndEquipment" id="PropertyPlantAndEquipment">
<link:definition>1025 - Disclosure - Property, Plant, and Equipment</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:definition>1026 - Disclosure - Right-of-use Assets</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/Inventories" id="Inventories">
<link:definition>1027 - Disclosure - Inventories</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/TradeReceivables" id="TradeReceivables">
<link:definition>1028 - Disclosure - Trade Receivables</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/OtherFinancialAndNonFinancialAssets" id="OtherFinancialAndNonFinancialAssets">
<link:definition>1029 - Disclosure - Other Financial and Non-Financial Assets</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:definition>1030 - Disclosure - Cash and Cash Equivalents</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/Equity" id="Equity">
<link:definition>1031 - Disclosure - Equity</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:definition>1032 - Disclosure - Provisions</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/ContractLiabilities" id="ContractLiabilities">
<link:definition>1033 - Disclosure - Contract Liabilities</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/TradeAndOtherPayables" id="TradeAndOtherPayables">
<link:definition>1034 - Disclosure - Trade and Other Payables</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/OtherFinancialAndNonFinancialLiabilities" id="OtherFinancialAndNonFinancialLiabilities">
<link:definition>1035 - Disclosure - Other Financial and Non-financial Liabilities</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/StatementOfCashFlows" id="StatementOfCashFlows">
<link:definition>1036 - Disclosure - Statement of Cash Flows</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:definition>1037 - Disclosure - Related Party Disclosures</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/FinancialInstrumentsAndFinancialRiskManagement" id="FinancialInstrumentsAndFinancialRiskManagement">
<link:definition>1038 - Disclosure - Financial Instruments And Financial Risk Management</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/ContingentLiabilitiesCommitmentsAndOtherFinancialObligations" id="ContingentLiabilitiesCommitmentsAndOtherFinancialObligations">
<link:definition>1039 - Disclosure - Contingent Liabilities, Commitments, and Other Financial Obligations</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/EventsAfterTheReportingDate" id="EventsAfterTheReportingDate">
<link:definition>1040 - Disclosure - Events After The Reporting Date</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/BasisOfConsolidationAndAccountingPoliciesPolicies" id="BasisOfConsolidationAndAccountingPoliciesPolicies">
<link:definition>1041 - Disclosure - Basis of Consolidation and Accounting Policies (Policies)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/BasisOfConsolidationAndAccountingPoliciesTables" id="BasisOfConsolidationAndAccountingPoliciesTables">
<link:definition>1042 - Disclosure - Basis of Consolidation and Accounting Policies (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/SegmentReportingAndInformationOnGeographicalAreasTables" id="SegmentReportingAndInformationOnGeographicalAreasTables">
<link:definition>1043 - Disclosure - Segment reporting and information on geographical areas (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:definition>1044 - Disclosure - Revenue (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/OtherOperatingIncomeTables" id="OtherOperatingIncomeTables">
<link:definition>1045 - Disclosure - Other operating income (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/CostOfMaterialsTables" id="CostOfMaterialsTables">
<link:definition>1046 - Disclosure - Cost of materials (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/PersonnelCostsTables" id="PersonnelCostsTables">
<link:definition>1047 - Disclosure - Personnel costs (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/AmortizationAndDepreciationTables" id="AmortizationAndDepreciationTables">
<link:definition>1048 - Disclosure - Amortization and Depreciation (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/OtherOperatingCostsTables" id="OtherOperatingCostsTables">
<link:definition>1049 - Disclosure - Other Operating Costs (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/ChangesInInventoriesOfFinishedGoodsAndWorkInProgressTables" id="ChangesInInventoriesOfFinishedGoodsAndWorkInProgressTables">
<link:definition>1050 - Disclosure - Changes in Inventories of Finished Goods and Work in Progress (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/OwnWorkCapitalizedTables" id="OwnWorkCapitalizedTables">
<link:definition>1051 - Disclosure - Own Work Capitalized (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/NetFinanceCostsTables" id="NetFinanceCostsTables">
<link:definition>1052 - Disclosure - Net Finance Costs (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/IncomeTaxesTables" id="IncomeTaxesTables">
<link:definition>1053 - Disclosure - Income Taxes (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/EarningsPerShareTables" id="EarningsPerShareTables">
<link:definition>1054 - Disclosure - Earnings per Share (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/IntangibleAssetsTables" id="IntangibleAssetsTables">
<link:definition>1055 - Disclosure - Intangible Assets (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/PropertyPlantAndEquipmentTables" id="PropertyPlantAndEquipmentTables">
<link:definition>1056 - Disclosure - Property, Plant, and Equipment (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/RightOfUseAssetsTables" id="RightOfUseAssetsTables">
<link:definition>1057 - Disclosure - Right-of-use Assets (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/InventoriesTables" id="InventoriesTables">
<link:definition>1058 - Disclosure - Inventories (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/TradeReceivablesTables" id="TradeReceivablesTables">
<link:definition>1059 - Disclosure - Trade Receivables (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/OtherFinancialAndNonFinancialAssetsTables" id="OtherFinancialAndNonFinancialAssetsTables">
<link:definition>1060 - Disclosure - Other Financial and Non-Financial Assets (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/ProvisionsTables" id="ProvisionsTables">
<link:definition>1061 - Disclosure - Provisions (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/TradeAndOtherPayablesTables" id="TradeAndOtherPayablesTables">
<link:definition>1062 - Disclosure - Trade and Other Payables (Tables)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/OtherFinancialAndNonFinancialLiabilitiesTables" id="OtherFinancialAndNonFinancialLiabilitiesTables">
<link:definition>1063 - Disclosure - Other Financial and Non-financial Liabilities (Tables)</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/StatementOfCashFlowsTables" id="StatementOfCashFlowsTables">
<link:definition>1064 - Disclosure - Statement of Cash Flows (Tables)</link:definition>
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<link:roleType roleURI="http://myn.com/role/RelatedPartyDisclosuresTables" id="RelatedPartyDisclosuresTables">
<link:definition>1065 - Disclosure - Related Party Disclosures (Tables)</link:definition>
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<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/FinancialInstrumentsAndFinancialRiskManagementTables" id="FinancialInstrumentsAndFinancialRiskManagementTables">
<link:definition>1066 - Disclosure - Financial Instruments And Financial Risk Management (Tables)</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/ContingentLiabilitiesCommitmentsAndOtherFinancialObligationsTables" id="ContingentLiabilitiesCommitmentsAndOtherFinancialObligationsTables">
<link:definition>1067 - Disclosure - Contingent Liabilities, Commitments, and Other Financial Obligations (Tables)</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/BasisOfAccountingAdditionalInformationDetail" id="BasisOfAccountingAdditionalInformationDetail">
<link:definition>1068 - Disclosure - Basis of Accounting - Additional Information (Detail)</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/BasisOfConsolidationAndAccountingPoliciesSummaryOfConsolidatedSubsidiariesDetail" id="BasisOfConsolidationAndAccountingPoliciesSummaryOfConsolidatedSubsidiariesDetail">
<link:definition>1069 - Disclosure - Basis of Consolidation and Accounting Policies - Summary of Consolidated Subsidiaries (Detail)</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/BasisOfConsolidationAndAccountingPoliciesAdditionalInformationDetail" id="BasisOfConsolidationAndAccountingPoliciesAdditionalInformationDetail">
<link:definition>1070 - Disclosure - Basis of Consolidation and Accounting Policies - Additional Information (Detail)</link:definition>
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<link:roleType roleURI="http://myn.com/role/BasisOfConsolidationAndAccountingPoliciesSummaryOfNatureAndTimingOfSatisficationOfPerformanceObligationInContractWithCustomersDetail" id="BasisOfConsolidationAndAccountingPoliciesSummaryOfNatureAndTimingOfSatisficationOfPerformanceObligationInContractWithCustomersDetail">
<link:definition>1071 - Disclosure - Basis of Consolidation and Accounting Policies - Summary of Nature and Timing of Satisfication of Performance Obligation in Contract with Customers (Detail)</link:definition>
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<link:roleType roleURI="http://myn.com/role/BasisOfConsolidationAndAccountingPoliciesSummaryOfNewlyIssuedFinancialReportingRulesNotYetAppliedDetail" id="BasisOfConsolidationAndAccountingPoliciesSummaryOfNewlyIssuedFinancialReportingRulesNotYetAppliedDetail">
<link:definition>1072 - Disclosure - Basis of Consolidation and Accounting Policies - Summary of Newly Issued Financial Reporting Rules not yet Applied (Detail)</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/MaterialJudgmentsEstimatesAndAssumptionsAdditionalInformationDetail" id="MaterialJudgmentsEstimatesAndAssumptionsAdditionalInformationDetail">
<link:definition>1073 - Disclosure - Material judgments, estimates and assumptions - Additional Information (Detail)</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/SegmentReportingAndInformationOnGeographicalAreasSummaryOfOperatingSegmentsDetail" id="SegmentReportingAndInformationOnGeographicalAreasSummaryOfOperatingSegmentsDetail">
<link:definition>1074 - Disclosure - Segment reporting and information on geographical areas - Summary of Operating Segments (Detail)</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/SegmentReportingAndInformationOnGeographicalAreasSummaryOfOperatingSegmentsParentheticalDetail" id="SegmentReportingAndInformationOnGeographicalAreasSummaryOfOperatingSegmentsParentheticalDetail">
<link:definition>1075 - Disclosure - Segment reporting and information on geographical areas - Summary of Operating Segments (Parenthetical) (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/SegmentReportingAndInformationOnGeographicalAreasSummaryOfRevenueAndNonCurrentAssetsBreakageBasedOnGeographicalAreasDetail" id="SegmentReportingAndInformationOnGeographicalAreasSummaryOfRevenueAndNonCurrentAssetsBreakageBasedOnGeographicalAreasDetail">
<link:definition>1076 - Disclosure - Segment reporting and information on geographical areas - Summary of Revenue and Non-Current Assets Breakage Based on Geographical Areas (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/SegmentReportingAndInformationOnGeographicalAreasAdditionalInformationDetail" id="SegmentReportingAndInformationOnGeographicalAreasAdditionalInformationDetail">
<link:definition>1077 - Disclosure - Segment reporting and information on geographical areas - Additional information (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/RevenueSummaryOfBreakageOfRevenueDetail" id="RevenueSummaryOfBreakageOfRevenueDetail">
<link:definition>1078 - Disclosure - Revenue - Summary of Breakage of Revenue (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://myn.com/role/RevenueAdditionalInformationDetail" id="RevenueAdditionalInformationDetail">
<link:definition>1079 - Disclosure - Revenue - Additional Information (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/OtherOperatingIncomeSummaryOfOtherOperatingIncomeDetail" id="OtherOperatingIncomeSummaryOfOtherOperatingIncomeDetail">
<link:definition>1080 - Disclosure - Other operating income - Summary of Other Operating Income (Detail)</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/CostOfMaterialsSummaryOfCostOfMaterialsDetail" id="CostOfMaterialsSummaryOfCostOfMaterialsDetail">
<link:definition>1081 - Disclosure - Cost of materials - Summary of Cost of Materials (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/CostOfMaterialsAdditionalInformationDetail" id="CostOfMaterialsAdditionalInformationDetail">
<link:definition>1082 - Disclosure - Cost of materials - Additional Information (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/PersonnelCostsSummaryOfPersonnelCostsDetail" id="PersonnelCostsSummaryOfPersonnelCostsDetail">
<link:definition>1083 - Disclosure - Personnel costs - Summary of Personnel Costs (Detail)</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/PersonnelCostsSummaryOfDetailedInformationAboutStockOptionsDetail" id="PersonnelCostsSummaryOfDetailedInformationAboutStockOptionsDetail">
<link:definition>1084 - Disclosure - Personnel costs - Summary of Detailed Information About Stock Options (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/PersonnelCostsSummaryOfMeasurementOfStockOptionPlanBasedOnMonteCarloSimulationDetail" id="PersonnelCostsSummaryOfMeasurementOfStockOptionPlanBasedOnMonteCarloSimulationDetail">
<link:definition>1085 - Disclosure - Personnel costs - Summary of Measurement of Stock Option Plan Based On Monte Carlo Simulation (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/PersonnelCostsSummaryOfDetailedInformationOfRestrictedStockUnitsUnderRsuPlanDetail" id="PersonnelCostsSummaryOfDetailedInformationOfRestrictedStockUnitsUnderRsuPlanDetail">
<link:definition>1086 - Disclosure - Personnel costs - Summary of Detailed Information of Restricted Stock Units Under RSU Plan (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/PersonnelCostsSummaryOfMeasurementOfRestrictedStockUnitPlanBasedOnBinomialModelDetail" id="PersonnelCostsSummaryOfMeasurementOfRestrictedStockUnitPlanBasedOnBinomialModelDetail">
<link:definition>1087 - Disclosure - Personnel costs - Summary of Measurement of Restricted Stock Unit Plan Based On Binomial Model (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/PersonnelCostsAdditionalInformationDetail" id="PersonnelCostsAdditionalInformationDetail">
<link:definition>1088 - Disclosure - Personnel costs - Additional Information (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/AmortizationAndDepreciationSummaryOfAmortizationAndDepreciationDetail" id="AmortizationAndDepreciationSummaryOfAmortizationAndDepreciationDetail">
<link:definition>1089 - Disclosure - Amortization and Depreciation - Summary of Amortization and depreciation (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/OtherOperatingCostsSummaryOtherOperatingCostsDetail" id="OtherOperatingCostsSummaryOtherOperatingCostsDetail">
<link:definition>1090 - Disclosure - Other Operating Costs - Summary Other Operating Costs (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/ChangesInInventoriesOfFinishedGoodsAndWorkInProgressSummaryOfIncreaseInInventoriesOfFinishedGoodsAndWorkInProgressDetail" id="ChangesInInventoriesOfFinishedGoodsAndWorkInProgressSummaryOfIncreaseInInventoriesOfFinishedGoodsAndWorkInProgressDetail">
<link:definition>1091 - Disclosure - Changes in Inventories of Finished Goods and Work in Progress - Summary of Increase in Inventories of Finished Goods and Work In Progress (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/OwnWorkCapitalizedSummaryOfDetailedInformationAboutOwnWorkCapitalizedDetail" id="OwnWorkCapitalizedSummaryOfDetailedInformationAboutOwnWorkCapitalizedDetail">
<link:definition>1092 - Disclosure - Own Work Capitalized - Summary of Detailed Information About Own Work Capitalized (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/OwnWorkCapitalizedSummaryOfDetailedInformationAboutBreakdownOfOwnWorkCapitalizedDetail" id="OwnWorkCapitalizedSummaryOfDetailedInformationAboutBreakdownOfOwnWorkCapitalizedDetail">
<link:definition>1093 - Disclosure - Own Work Capitalized - Summary of Detailed Information About Breakdown of Own Work Capitalized (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/NetFinanceCostsSummaryOfFinancialResultDetail" id="NetFinanceCostsSummaryOfFinancialResultDetail">
<link:definition>1094 - Disclosure - Net Finance Costs -  Summary of Financial Result (Detail)</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/NetFinanceCostsSummaryOfBorrowingCostsDetail" id="NetFinanceCostsSummaryOfBorrowingCostsDetail">
<link:definition>1095 - Disclosure - Net Finance Costs - Summary of Borrowing Costs (Detail)</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/IncomeTaxesSummaryOfDisclosingInformationRelatingToTaxExpensesDetail" id="IncomeTaxesSummaryOfDisclosingInformationRelatingToTaxExpensesDetail">
<link:definition>1096 - Disclosure - Income Taxes - Summary of Disclosing Information Relating to Tax Expenses (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/IncomeTaxesSummaryOfDisclosingInformationRelatingToTaxExpensesParentheticalDetail" id="IncomeTaxesSummaryOfDisclosingInformationRelatingToTaxExpensesParentheticalDetail">
<link:definition>1097 - Disclosure - Income Taxes - Summary of Disclosing Information Relating to Tax Expenses (Parenthetical) (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/IncomeTaxesSummaryOfBalancesOfDeferredTaxAssetsAndLiabilitiesDetail" id="IncomeTaxesSummaryOfBalancesOfDeferredTaxAssetsAndLiabilitiesDetail">
<link:definition>1098 - Disclosure - Income Taxes - Summary of Balances of Deferred Tax Assets and Liabilities (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/IncomeTaxesAdditionalInformationDetail" id="IncomeTaxesAdditionalInformationDetail">
<link:definition>1099 - Disclosure - Income Taxes - Additional Information (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/EarningsPerShareSummaryOfDetailedInformationAboutEarningsPerShareDetail" id="EarningsPerShareSummaryOfDetailedInformationAboutEarningsPerShareDetail">
<link:definition>1100 - Disclosure - Earnings per Share - Summary of Detailed Information About Earnings Per Share (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/EarningsPerShareAdditionalInformationDetail" id="EarningsPerShareAdditionalInformationDetail">
<link:definition>1101 - Disclosure - Earnings per Share - Additional Information (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/IntangibleAssetsSummaryOfDetailedInformationAboutIntangibleAssetsOtherThanGoodwillDetail" id="IntangibleAssetsSummaryOfDetailedInformationAboutIntangibleAssetsOtherThanGoodwillDetail">
<link:definition>1102 - Disclosure - Intangible Assets - Summary of Detailed Information About Intangible Assets Other Than Goodwill (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/IntangibleAssetsSummaryOfDetailedInformationAboutAmortizationOfIntangibleAssetsOtherThanGoodwillDetail" id="IntangibleAssetsSummaryOfDetailedInformationAboutAmortizationOfIntangibleAssetsOtherThanGoodwillDetail">
<link:definition>1103 - Disclosure - Intangible Assets - Summary of Detailed Information About Amortization Of Intangible Assets Other Than Goodwill (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/IntangibleAssetsSummaryOfDetailedInformationAboutCarryingAmountOfIntangibleAssetsOtherThanGoodwillDetail" id="IntangibleAssetsSummaryOfDetailedInformationAboutCarryingAmountOfIntangibleAssetsOtherThanGoodwillDetail">
<link:definition>1104 - Disclosure - Intangible Assets - Summary of Detailed Information About Carrying Amount of Intangible Assets Other Than Goodwill (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/IntangibleAssetsSummaryOfDetailedInformationAboutCarryingAmountsOfTheCapitalizedDevelopmentProjectsDetail" id="IntangibleAssetsSummaryOfDetailedInformationAboutCarryingAmountsOfTheCapitalizedDevelopmentProjectsDetail">
<link:definition>1105 - Disclosure - Intangible Assets - Summary of Detailed Information About Carrying Amounts of the Capitalized Development Projects (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/IntangibleAssetsSummaryOfDetailedInformationAboutUsefulLifeCarryingAmountsOfTheCapitalizedDevelopmentProjectsDetail" id="IntangibleAssetsSummaryOfDetailedInformationAboutUsefulLifeCarryingAmountsOfTheCapitalizedDevelopmentProjectsDetail">
<link:definition>1106 - Disclosure - Intangible Assets - Summary of Detailed Information About Useful Life Carrying Amounts of the Capitalized Development Projects (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/IntangibleAssetsAdditionalInformationDetail" id="IntangibleAssetsAdditionalInformationDetail">
<link:definition>1107 - Disclosure - Intangible Assets - Additional Information (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/PropertyPlantAndEquipmentAdditionalInformationDetail" id="PropertyPlantAndEquipmentAdditionalInformationDetail">
<link:definition>1108 - Disclosure - Property, Plant, and Equipment - Additional Information (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/PropertyPlantAndEquipmentSummaryOfPropertyPlantAndEquipmentDetail" id="PropertyPlantAndEquipmentSummaryOfPropertyPlantAndEquipmentDetail">
<link:definition>1109 - Disclosure - Property, Plant, and Equipment - Summary of Property, Plant, and Equipment (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/RightOfUseAssetsSummaryOfRightOfUseAssetsDetail" id="RightOfUseAssetsSummaryOfRightOfUseAssetsDetail">
<link:definition>1110 - Disclosure - Right-of-use Assets - Summary of Right Of Use Assets (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/RightOfUseAssetsSummaryOfLeaseExpensesDetail" id="RightOfUseAssetsSummaryOfLeaseExpensesDetail">
<link:definition>1111 - Disclosure - Right-of-use Assets - Summary of Lease Expenses (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/RightOfUseAssetsSummaryOfUndiscountedPotentialFutureLeasePaymentsFromTheExerciseOfExtensionOptionsDetail" id="RightOfUseAssetsSummaryOfUndiscountedPotentialFutureLeasePaymentsFromTheExerciseOfExtensionOptionsDetail">
<link:definition>1112 - Disclosure - Right-of-use Assets - Summary of Undiscounted Potential Future Lease Payments From The Exercise of Extension Options (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/RightOfUseAssetsAdditionalInformationDetail" id="RightOfUseAssetsAdditionalInformationDetail">
<link:definition>1113 - Disclosure - Right-of-use Assets - Additional Information (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/InventoriesSummaryOfBreakDownOfInventoriesIsPresentedDetail" id="InventoriesSummaryOfBreakDownOfInventoriesIsPresentedDetail">
<link:definition>1114 - Disclosure - Inventories - Summary of break-down of inventories is presented (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/InventoriesSummaryOfWriteDownsOfInventoryDetail" id="InventoriesSummaryOfWriteDownsOfInventoryDetail">
<link:definition>1115 - Disclosure - Inventories - Summary of write-downs of inventory (Detail)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://myn.com/role/InventoriesAdditionalInformationDetail" id="InventoriesAdditionalInformationDetail">
<link:definition>1116 - Disclosure - Inventories - Additional Information (Detail)</link:definition>
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<element name="ScheduleOfRemainingContractualTermsOfFinancialLiabilitiesIncludingEstimatedInterestPaymentsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_ScheduleOfRemainingContractualTermsOfFinancialLiabilitiesIncludingEstimatedInterestPaymentsLineItems" substitutionGroup="xbrli:item" />
<element name="TradePayablesMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_TradePayablesMember" substitutionGroup="xbrli:item" />
<element name="IntercompanyPayablesMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_IntercompanyPayablesMember" substitutionGroup="xbrli:item" />
<element name="OtherLiabilitiesMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_OtherLiabilitiesMember" substitutionGroup="xbrli:item" />
<element name="IntercompanyLoanMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_IntercompanyLoanMember" substitutionGroup="xbrli:item" />
<element name="IntercompanyReceivablesMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_IntercompanyReceivablesMember" substitutionGroup="xbrli:item" />
<element name="FinancialInstrumentsAndFinancialRiskManagementTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_FinancialInstrumentsAndFinancialRiskManagementTable" substitutionGroup="xbrldt:hypercubeItem" />
<element name="FinancialInstrumentsAndFinancialRiskManagementLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_FinancialInstrumentsAndFinancialRiskManagementLineItems" substitutionGroup="xbrli:item" />
<element name="EquityRatio" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="myna_EquityRatio" substitutionGroup="xbrli:item" />
<element name="LineOfCreditFacilityMaximumBorrowingCapacity" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="myna_LineOfCreditFacilityMaximumBorrowingCapacity" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="PercentageOfUtilizationOfLoanCommitmentWouldNotExceedMarketCapitalization" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="myna_PercentageOfUtilizationOfLoanCommitmentWouldNotExceedMarketCapitalization" substitutionGroup="xbrli:item" />
<element name="PercentageOfCommitmentFee" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="myna_PercentageOfCommitmentFee" substitutionGroup="xbrli:item" />
<element name="PercentageOfIncreaseInRegisteredCapital" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="myna_PercentageOfIncreaseInRegisteredCapital" substitutionGroup="xbrli:item" />
<element name="LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="myna_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="CapitalRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_CapitalRiskMember" substitutionGroup="xbrli:item" />
<element name="SaleOfStockAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_SaleOfStockAxis" substitutionGroup="xbrldt:dimensionItem" />
<element name="SaleOfStockMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_SaleOfStockMember" substitutionGroup="xbrli:item" />
<element name="IpoMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_IpoMember" substitutionGroup="xbrli:item" />
<element name="TypeOfTrancheAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_TypeOfTrancheAxis" substitutionGroup="xbrldt:dimensionItem" />
<element name="TypeOfTrancheMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_TypeOfTrancheMember" substitutionGroup="xbrli:item" />
<element name="TrancheOneMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_TrancheOneMember" substitutionGroup="xbrli:item" />
<element name="SubsequentEventsAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_SubsequentEventsAxis" substitutionGroup="xbrldt:dimensionItem" />
<element name="SubsequentEventsDomain" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_SubsequentEventsDomain" substitutionGroup="xbrli:item" />
<element name="SubsequentEventsMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_SubsequentEventsMember" substitutionGroup="xbrli:item" />
<element name="DisclosureOfContingentLiabilitiesAndCommitmentsAndOtherFinancialObligationsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_DisclosureOfContingentLiabilitiesAndCommitmentsAndOtherFinancialObligationsAbstract" substitutionGroup="xbrli:item" />
<element name="DisclosureOfContingentLiabilitiesAndCommitmentsAndOtherFinancialObligationsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_DisclosureOfContingentLiabilitiesAndCommitmentsAndOtherFinancialObligationsTable" substitutionGroup="xbrldt:hypercubeItem" />
<element name="DisclosureOfContingentLiabilitiesAndCommitmentsAndOtherFinancialObligationsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_DisclosureOfContingentLiabilitiesAndCommitmentsAndOtherFinancialObligationsLineItems" substitutionGroup="xbrli:item" />
<element name="IncidentalRentalCostsMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_IncidentalRentalCostsMember" substitutionGroup="xbrli:item" />
<element name="OtherMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_OtherMember" substitutionGroup="xbrli:item" />
<element name="FinancialObligationsFromOutstandingPurchaseOrders" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="myna_FinancialObligationsFromOutstandingPurchaseOrders" substitutionGroup="xbrli:item" xbrli:balance="credit" />
<element name="AreaOfOfficeSpace" type="dtr-types:areaItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="myna_AreaOfOfficeSpace" substitutionGroup="xbrli:item" />
<element name="InitialLeaseTermOfContract" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" id="myna_InitialLeaseTermOfContract" substitutionGroup="xbrli:item" />
<element name="CreditAgreementMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_CreditAgreementMember" substitutionGroup="xbrli:item" />
<element name="MunichMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="myna_MunichMember" substitutionGroup="xbrli:item" />
</schema>
