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  <element id="avt_TaxCutsAndJobsActOf2017TransitionTaxPeriodForPayment" name="TaxCutsAndJobsActOf2017TransitionTaxPeriodForPayment" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
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</xsd:schema>
