圆锥底<测>
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extension of base field taper 伸出锥度
taper base
锥基
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The equations for thread taper, thread pitch, thread angle and height of thread can be derived on the base of fitted lines, which are accurate enough to meet the needs of industrial measurement.
该方法可测量螺纹的锥度、螺距、螺纹夹角和螺纹高度，测量精度可以满足工业测量要求。
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