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<b>thus </b><a NAME="E1:5_2_1"/>
<font color="Maroon" title="c2">x</font> <a href="domain_1.html#K3" title="DOMAIN_1:func.3">`2</a>  is   <a href="petri.html#NM2" title="PETRI:NM.2">place</a> of <font color="Maroon" title="c1">PTN</font>
 ;<br/>


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