在接触式弯管测量机的基础上，采用激光CCD对测量叉进行改进，实现弯管的非接触测量。

Based on the contact type measuring machine for bent tube, the probe, which is improved by using laser and CCD, can be used to achieve the non contact measurement of a bent tube.

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弯针机构与成圈叉机构是暗缝缝纫机的两个重要机构。

Bend needle mechanism and looper mechanism are two important mechanisms in blind stitching machine.

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