偏心轮机构是由铰链四杆机构()演化而来的。A.扩大转动副 B.取不同的构件为机架 C 发布时间:2019-10-28 04:52 │ 来源:www.tikuol.com 题型:单项选择题 问题: 偏心轮机构是由铰链四杆机构()演化而来的。A.扩大转动副B.取不同的构件为机架C.化转动副为移动副D.化低副为高副
题型:单项选择题 A new coil of nylon line should be opened by().A.pulling the end up through the eye of the coilB.taking a strain on both endsC.uncoiling from the outside with the coil standing on endD.unreeling from a spool 查看答案