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  <xs:element id="wab_DigitalElectronicsMember" abstract="true" name="DigitalElectronicsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="wab_DenverTransitInstallationofConstantWirelessCrossingsMember" abstract="true" name="DenverTransitInstallationofConstantWirelessCrossingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="wab_ContractwithCustomerLiabilityRevenueRecognizedfromCurrentYearAdditions" abstract="false" name="ContractwithCustomerLiabilityRevenueRecognizedfromCurrentYearAdditions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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</xs:schema>
