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用一个断爪的游标卡尺作下图所示的改制。使用时调整游标,用一标准尺寸调整百分表零位,即可对两孔中心距A进行测量。
With a broken claw vernier caliper for the restructuring shown below. Adjust the cursor when used, with a standard size dial gauge zero, you can measure the distance from the center of two holes A