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  <xs:element id="dco_PercentageOfRevenuesFromContractWithCustomers" abstract="false" name="PercentageOfRevenuesFromContractWithCustomers" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
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  <xs:element id="dco_TaxBenefitForExerciseOfStockOptionsAndIssuanceOfSharesUponVestingOfRestrictedStockGrants" abstract="false" name="TaxBenefitForExerciseOfStockOptionsAndIssuanceOfSharesUponVestingOfRestrictedStockGrants" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="dco_DefinedBenefitPlanFairValueofPooledFunds" abstract="false" name="DefinedBenefitPlanFairValueofPooledFunds" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="dco_DeferredTaxAssetsTaxCreditCarryforwardsState" abstract="false" name="DeferredTaxAssetsTaxCreditCarryforwardsState" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="dco_AccruedIncomeTaxesAndOtherCurrent" abstract="false" name="AccruedIncomeTaxesAndOtherCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="dco_RightOfUseAssetsObtainedInExchangeForLeaseObligationsAbstract" abstract="true" name="RightOfUseAssetsObtainedInExchangeForLeaseObligationsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
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  <xs:element id="dco_DefinedBenefitPlanOtherInvestmentsMember" abstract="true" name="DefinedBenefitPlanOtherInvestmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="dco_DebtInstrumentPercentageofExcessCashFlowPaymentWhenLeverageRatioisLessthanorEqualto3.25" abstract="false" name="DebtInstrumentPercentageofExcessCashFlowPaymentWhenLeverageRatioisLessthanorEqualto3.25" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
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  <xs:element id="dco_LitigationAndContingenciesPolicyPolicyTextBlock" abstract="false" name="LitigationAndContingenciesPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="dco_PaymentsFromIssuanceofStockUnderAwardPlansNet" abstract="false" name="PaymentsFromIssuanceofStockUnderAwardPlansNet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_DefinedBenefitPlanUnrecognizedActuarialNetGainsLosses" abstract="false" name="DefinedBenefitPlanUnrecognizedActuarialNetGainsLosses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_FinanceLeaseCost" abstract="false" name="FinanceLeaseCost" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
