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【多选题】
关于复合轮系传动比计算方法论述的一些选项,哪些选项是正确的( )A.
复合轮系传动比计算必须将其轮系中的定轴轮系和周转轮系划分出来再分别计算
B.
复合轮系只要将其中轮系划分出来，不管剩余几个行星轮系都可用转化机构法来并计算其传动比
C.
复合轮系传动比正确的计算方法是分清轮系、分别计算和联立求解
D.
复合轮系的首、末两轮的转向转系需根据其传动比计算结果来确定
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