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1·In this paper, the application and the mechanism principle of torsion spring overrun clutch are introduced.

介绍了扭簧式超越离合器的应用和机构原理。

2·The needle roller clutch bearing is a kind of compound function bearing which transmits torque between the shaft and housing in one direction and allows free overrun in the opposite direction.

滚针离合器轴承是可单向传递轴和轴承座之间的扭矩，而反方向允许自由转动的一种复合功能轴承。