孔距游标卡尺
1.可直接测出两孔中心距 Center distance between two holes can be easili obtained by moving slider.
2.可测量台阶的中心距 Center distance between two steps holes can be obtained too.
3.可测量大孔孔距 Can be used to measure the diameter of big hole.
4.可进行长度测量 With external measurement.
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