教育 来源:互联网 时间:2023-05-09 07:02:30
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1、一般来说,由于加工误差的原因,通过测量内径来计算外径和公称直径是不太准确的,这时最好用螺距规测量内螺纹的螺距,再通过螺距查相应的公称直径,英制的按英制螺纹查,公制的按公制螺纹查,用得比较多的就这两种.。
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