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你不出拳,怎么賺錢? |
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點(diǎn)評(píng)
看受力點(diǎn),受力點(diǎn)在支座上,就沒有彎矩,只要有偏離,就一定有彎矩 ,具體多少,要建立聯(lián)立方程解一下,你看理論力學(xué)吧,寫的很清楚,我不多啰嗦了,謝謝
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