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过定�轮的绳子两端挂不同重量的物体后，绳子两边的拉力相等吗？ 知乎 Template






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sketch 2788 Yuno Gasai from Mirai Nikki by Cristina Love
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tomski过定�轮的绳子两端挂不同重量的物体后，绳子两边的拉力相等吗？ 知乎 coloring
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