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一個(gè)機(jī)械結(jié)構(gòu),請(qǐng)教 |
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點(diǎn)評(píng)
別人說加摩擦力的方案你沒看明白,曳引力如何計(jì)算的,,歐拉公式
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點(diǎn)評(píng)
曳引輪上的重力是哪里來的,?
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