闸圈数显卡尺

1.带电源开关   Manual power on/off.
2.任意位置清零和公英制转换   Zero setting and mm/inch conversion at any position.
3.带数据输出口   With data output interface.
4.测量制动鼓磨损痕迹深度尺寸   To measure the wear dimension of the automobile brake drum.

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