凸轮机构中,通过适当选取从动件的偏置方向减小推程压力角的同时,回程压力角( )
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绘制滚子直动从动件盘形凸轮轮廓曲线时,为防止滚子从动件运动失真,滚子半径必须( )凸轮理论轮廓曲线的最小曲率半径。
A. 小于
B. 大于
C. 大于等于
用同一凸轮驱动不同类型的从动件(尖底、滚子或平底)时,各从动件的运动规律( )
A. 相同
B. 不同
C. 无偏距时相同
以下标记符中，用于设置表格标题的是（ ）
A.
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