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如何計(jì)算附圖的力F? |
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點(diǎn)評(píng)
不要誤導(dǎo)人
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點(diǎn)評(píng)
圓的線速度就是桿的速度,。。,。我不太懂樓上說(shuō)的那么高端干嘛,。�,;蛟S我笨
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