rotary unit meaning in Chinese

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Repairing technical requirement for special equipment of bucket dredgers part 6 : repair and asseemblage for rotary unit
抓斗挖泥船专用设备修理技术要求第6部分：旋转起吊机构旋转装置修理装配
In the paper , based on the method of low pair replacing with high pair , the problem of cam design was transferred to that of linkage design . by means of rotary unit vectors , the equations of displacement , velocity and acceleration of the replacement mechanisms were developed . and then , the virtual linkage ' s length and direction were deduced
论文基于高副低代原理，将平面凸轮机构设计与再现函数的平面连杆机构设计统一为同一种方法，运用圆向量函数建立代换机构的位移、速度、加速度矢量方程式，求取虚拟连杆杆长和方向，由此展开凸轮理论廓线、实际廓线、曲率半径和压力角的求解，并得出用圆形刀具加工凸轮时刀具中心的轨迹方程。