This paper describes a new method and device for measuring helical line, pitch diameter, taper and half-angle of thread of petroleum thread gauges.

本文介绍一种测量石油螺纹量规的螺旋线、中径、锥度和牙形半角的新方法及装置。

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This paper introduces three method of machining technique, technique analysis and measuring for internal spline with reversed taper teeth.

本文介绍三种倒锥齿内花键的加工工艺，工艺分析和测量方法。

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This paper introduces the measuring principle, calculating formula and measuring method of the taps for taper pipe threads through the universal tool microscope.

本文介绍了锥管螺纹丝锥在万工显示上的测量原理、计算公式及测量方法。

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