The measurement reference of GCPC.
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Abstract
<p>The (<i>a</i><sub><i>x</i></sub>, <i>b</i><sub><i>x</i></sub>, <i>d</i><sub><i>x</i></sub>) and (<i>e</i><sub><i>x</i></sub>, <i>g</i><sub><i>x</i></sub>) corresponds to the </p><p></p><p></p><p></p><p>P<mi>m</mi><mi>c</mi></p><p><mrow></mrow><mi>x</mi></p><p></p><p></p><p></p> while the (<i>a</i><sub><i>y</i></sub>, <i>b</i><sub><i>y</i></sub>, <i>d</i><sub><i>y</i></sub>) and (<i>e</i><sub><i>y</i></sub>, <i>g</i><sub><i>y</i></sub>) corresponds to the <p></p><p></p><p></p><p>P<mi>m</mi><mi>c</mi></p><p><mrow></mrow><mi>y</mi></p><p></p><p></p><p></p>. The two dotted circles are determined by the two solid arcs respectively.<p></p
