短语词组短语minor r axis 短轴minor axis of cam [机]凸轮短轴minor axis radius 短轴半径semi -minor axis 半短轴;半短径;短半径minor semi -axis 短半轴;[数]短轴半径minor axis of flexspline [机]柔轮短轴major axis minor axis 长短轴 返回 minor axis