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1·CNC turning trapezoidal thread to explore several ways.

探讨数控车削梯形螺纹的几种方法。

2·This article mainly introduces the method that adopts gear caliper to measure the median diameter normal tooth thickness of double-line trapezoidal thread.

本文主要介绍了采用齿轮卡尺测量双线梯形螺纹中径法向齿厚的方法，同时也测量出螺距产生的误差。

3·The separate flushing(air) system can be connected with shank adaptors by internal or external rope thread or trapezoidal thread . The customers can order according to their own requirements.

旁侧供水（风）系统钎尾有内外波形、梯形螺纹连接，用户可根据需要单独订货。