By using a steel coupling mechanism, the distal phalanx transmission ratio was kept exactly 1:1 over the whole movement range.
钢丝耦合机构的采用，保证了手指末端关节在整个运动范围内都能够保证精确定1：1传动比。
The structure, mechanism and properties of limit moment type steel ball coupling are introduced, its application on the drum is also described.
介绍了限矩型钢球联轴器的结构、原理、性能以及在制革转鼓上的应用效果。
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