对于理论力学中的无�滚动,如果一个圆在另一个圆上�动,为什么无�滚动的条件是这样? 知乎 Template




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tomski对于理论力学中的无�滚动,如果一个圆在另一个圆上�动,为什么无�滚动的条件是这样? 知乎 coloring