低副是指两构件通过面接触而构成的运动副。按两构件之间的相对运动特征低副分为转动副、移动副、螺旋副。
所设计的楔块式低副单向超越离合器，主要由内环、外环、楔块和拨盘等构件组成。
The V-shaped unidirectional clutch is made of inner ring, outer ring, wedge and driven disk.
综合考虑低副单向超越离合器的外型尺寸、自锁等性能要求，对低副单向超越离合器进行了优化设计。
Generally considering the size, self-locking capacity and other constraint conditions of new overrunning clutch, an optimizing design is adopted.
用几何法证明了等视角定理和低副运动可逆性在铰链四杆机构设计中的等价性，以求揭示它们之间的本质联系。
The equivalence between theorem of equal angle of view and reversible property of low pair, applied in synthesis of plane four-bar linkage, is demonstrated to reveal essence of their relation.
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