No doubt the bushing constriction of roller chain would be of great advantages for ensuring its reliable connection, but it would exert a bad influence on the quality of roller chain.
套筒滚子链套筒的颈缩对保证联接牢固度固然有好处，但对链条的质量却产生不良影响。
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。
Each free roller or discharge roller has its separate driving motor and reducing gear for chain wheel and chain driving system.
每个自由辊或出坯辊由各自的电机、减速机通过链轮链条驱动。
Each free roller or discharge roller has its separate driving motor and reducing gear for chain wheel and chain driving system.
每个自由辊或出坯辊由各自的电机、减速机通过链轮链条驱动。
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