The pig to receive clear caliper ball after tube, remove the clear the caliper plate pig, if caliper board did not obvious deformation, caliper qualified.

测径清管器到达收球筒后，拆下清管器上的测径板，若测径板没有明显变形，测径合格。

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A slidable caliper head is additionally arranged on the scribing feet combined with the fixed plate, and the caliper head is provided with an adjustable scribing needle.

在与固定板结合的划脚上增加了一个可滑动的卡尺头，卡尺头上有一可调划针。

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A circular arc fixed plate has the Angle scale, and one side of the circular arc fixed plate is prolonged as the caliper head which provided with two cylindrical pins.

圆弧形固定板有角度刻度，并将一边延长作卡尺头，上边装有两个圆柱销。

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