选择范围广，如套筒锁、单向关断、直通式及带链条的释放夹等。
A wide variety of options is available like sleeve lock, one-way and straight-thru designs, release clamp with chain, etc.
形圈链条中销轴和套筒的磨损主要以疲劳磨损为主，并伴随着粘着磨损；
The bushes and bearing pins of the rubber O ring roller chains were characterized by stress fatigue wear and adhesion wear;
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。
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.
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