ag-gipp/GoUldI

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      <msub data-semantic-type="subscript" data-semantic-role="latinletter" data-semantic-id="4" data-semantic-children="2,3" data-semantic-parent="7">
        <mi data-semantic-type="identifier" data-semantic-role="latinletter" data-semantic-font="italic" data-semantic-id="2" data-semantic-parent="4">m</mi>
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          <mtext data-semantic-type="text" data-semantic-role="unknown" data-semantic-font="normal" data-semantic-id="3" data-semantic-parent="4">motor</mtext>
        </mrow>
      </msub>
    </mrow>
    <annotation encoding="application/x-tex">rpm_{\text{motor}}</annotation>
  </semantics>
</math>