其方法代替了传统的手工测量，而且易于机器自动反馈控制玻璃棒的直径变化。
The method not only can substitute traditional manual measurement, but also can control the change of the diameter by machine conveniently.
分析齿轮主要参数，提出用测量跨棒（）和公法线长度计算斜齿圆柱齿轮螺旋角的测绘方法，并推导出螺旋角的计算公式。
In this paper calculating method of lead angle of helical gear by measuring span length of length bar and base tangent length is put forward and lead angle calculating formula is deducel.
已经设计出专门的探头来测量半导体晶圆片和半导体棒的电阻率。
Special probes have been designed for making resistivity measurements on semiconductor wafers and bars.
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