It includes the principle of loss definition and loss calculation methods.
其中包括损失的界定原则和损失计算方法两个问题。
This paper briefly reviews several calculation methods for roller chain drive, and discusses calculation principle of finite service life for roller chain.
本文扼要评述了几种链传动计算方法，讨论了钻机链传动的有限寿命计算原理。
The structure principle of three line pendulum is outlined, and the calculation methods of its shimmy period in small and large Angle are presented.
叙述了三线摆的结构原理，介绍了该摆小角与大角摆动周期的计算方法。
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