By the use of the displacing enveloping drawing method, a set of exact formulae for calculating the virtualpitch diameter is deduced and verified by measured data.
This paper deals with the interchangeability of sawtooth thread used in unidirectional heavy load and the exact fit which apply the fit specific property by means of virtualpitch diameter.
本文讨论了单向承载大、又需紧密配合的锯齿形螺纹互换性问题。
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I can still teach you how to play Red Planet at a Virtual World ten years after I flew my last mission. I can recite the sales pitch word for word.