5627| 30
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力學(xué)分析:力分力與力矩計(jì)算結(jié)果不同 |
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點(diǎn)評(píng)
當(dāng)桿處于水平放置時(shí),鉸接能提供垂直方向的力嗎??
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點(diǎn)評(píng)
不能只用一種方法算出嗎
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