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  <element name="NoncashForeignExchangeLossRelatedToVenezuelaDevaluation" id="drc_NoncashForeignExchangeLossRelatedToVenezuelaDevaluation" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="NotesContingentlyRepayableWhen75PercentOfSyndicatedTermLoanRepaidMember" id="drc_NotesContingentlyRepayableWhen75PercentOfSyndicatedTermLoanRepaidMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="NotesContingentlyRepayableWhenSyndicatedTermLoanFullyRepaidMember" id="drc_NotesContingentlyRepayableWhenSyndicatedTermLoanFullyRepaidMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="NotesToFinancialStatementsAbstract" id="drc_NotesToFinancialStatementsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="NumberOfEmployeesAffectedByInvoluntaryTermination" id="drc_NumberOfEmployeesAffectedByInvoluntaryTermination" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OptionPriceToAcquireBusiness" id="drc_OptionPriceToAcquireBusiness" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OtherNotesPayableMember" id="drc_OtherNotesPayableMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OtherWorkingCapitalLinesMember" id="drc_OtherWorkingCapitalLinesMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OwnershipInterestInJointVenture" id="drc_OwnershipInterestInJointVenture" type="num:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ParticipatingLoansMember" id="drc_ParticipatingLoansMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PensionPlansTextBlock" id="drc_PensionPlansTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PercentageOfConsolidatedNetIncome" id="drc_PercentageOfConsolidatedNetIncome" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PercentageOfNetRevenue" id="drc_PercentageOfNetRevenue" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PercentageOfRedeemableNotesMaximum" id="drc_PercentageOfRedeemableNotesMaximum" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PercentileRankOfShareholderReturnOfStock" id="drc_PercentileRankOfShareholderReturnOfStock" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PerformanceBasedRestrictedStockMember" id="drc_PerformanceBasedRestrictedStockMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PeterBrotherhoodLtdMember" id="drc_PeterBrotherhoodLtdMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PigManureTreatmentFacilitiesMember" id="drc_PigManureTreatmentFacilitiesMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PostretirementBenefitsOtherThanPensionsTextBlock" id="drc_PostretirementBenefitsOtherThanPensionsTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PrincipalPaymentsPercentage" id="drc_PrincipalPaymentsPercentage" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ProgressPaymentsNettedAgainstInventoryForInProcessContractsOrPrograms" id="drc_ProgressPaymentsNettedAgainstInventoryForInProcessContractsOrPrograms" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ProjectFinanceFacilityMember" id="drc_ProjectFinanceFacilityMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ProvisionForInventoryReserves" id="drc_ProvisionForInventoryReserves" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ProvisionForUncertainTaxPositions" id="drc_ProvisionForUncertainTaxPositions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="RamgenPowerSystemsLLCMember" id="drc_RamgenPowerSystemsLLCMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="RemainingAmortizationPeriod" id="drc_RemainingAmortizationPeriod" type="xbrli:decimalItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="RevolvingCreditFacilityMember" id="drc_RevolvingCreditFacilityMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfDebtOutstandingTable" id="drc_ScheduleOfDebtOutstandingTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="ScheduleOfOtherPostretirementBenefitsNetBenefitCostsTableTextBlock" id="drc_ScheduleOfOtherPostretirementBenefitsNetBenefitCostsTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SeniorSecuredCreditFacilityMember" id="drc_SeniorSecuredCreditFacilityMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SeniorSubordinatedNotes6.5PercentDue2021Member" id="drc_SeniorSubordinatedNotes6.5PercentDue2021Member" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SeniorSubordinatedNotes7.375PercentDue2014Member" id="drc_SeniorSubordinatedNotes7.375PercentDue2014Member" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SeniorSubordinatedNotesRedeemableBeginningMay1st2016Member" id="drc_SeniorSubordinatedNotesRedeemableBeginningMay1st2016Member" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SeniorSubordinatedNotesRedeemableBeginningMay1st2019Member" id="drc_SeniorSubordinatedNotesRedeemableBeginningMay1st2019Member" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SeniorSubordinatedNotesRedeemablePriorToMay1st2014Member" id="drc_SeniorSubordinatedNotesRedeemablePriorToMay1st2014Member" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SeniorSubordinatedNotesRedeemablePriorToMay1st2016Member" id="drc_SeniorSubordinatedNotesRedeemablePriorToMay1st2016Member" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRange" id="drc_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRange" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SharePurchaseAgreement" id="drc_SharePurchaseAgreement" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareRepurchasesByProgramAxis" id="drc_ShareRepurchasesByProgramAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:dimensionItem"/>
  <element name="ShareRepurchasesByProgramDomain" id="drc_ShareRepurchasesByProgramDomain" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SpainAndItalyMember" id="drc_SpainAndItalyMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="StockPlansVestingPercentageForRestrictedStockUnitsMaximum" id="drc_StockPlansVestingPercentageForRestrictedStockUnitsMaximum" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="StockPlansVestingPercentageForRestrictedStockUnitsMinimum" id="drc_StockPlansVestingPercentageForRestrictedStockUnitsMinimum" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SubsequentEventMember" id="drc_SubsequentEventMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SubsidizedLoansMember" id="drc_SubsidizedLoansMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SyndicatedRevolvingLoanFacilityMember" id="drc_SyndicatedRevolvingLoanFacilityMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SyndicatedRevolvingWorkingCapitalLoanFacilityMember" id="drc_SyndicatedRevolvingWorkingCapitalLoanFacilityMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SyndicatedTermLoanAndWorkingCapitalLineMember" id="drc_SyndicatedTermLoanAndWorkingCapitalLineMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="TenderOfferConsiderationDescription" id="drc_TenderOfferConsiderationDescription" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="TenderOfferExpirationDate" id="drc_TenderOfferExpirationDate" type="us-types:dateStringItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="TermLoanFacilityAdditionalDelayedDrawMember" id="drc_TermLoanFacilityAdditionalDelayedDrawMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="TermLoanFacilityInitialDrawMember" id="drc_TermLoanFacilityInitialDrawMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="TermLoanFacilityMember" id="drc_TermLoanFacilityMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="TimeLapseRestrictedUnitsMember" id="drc_TimeLapseRestrictedUnitsMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="TurboMachinesFieldServicesPtyLtdMember" id="drc_TurboMachinesFieldServicesPtyLtdMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="UnCollaredAcceleratedShareRepurchaseProgramMember" id="drc_UnCollaredAcceleratedShareRepurchaseProgramMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="USFederalStatutoryIncomeTaxRate" id="drc_USFederalStatutoryIncomeTaxRate" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
</schema>
