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發(fā)布時(shí)間: 2018-4-27 23:27
正文摘要:看圖,,直線導(dǎo)軌的受力,,這些公式怎么來的?,? 是按力平衡,,力矩平衡計(jì)算所求得的嗎?,? |
夢回舊時(shí)光 發(fā)表于 2018-4-28 08:18 那怎么求得呀 |
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