4616| 21
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結(jié)構(gòu)問(wèn)題,這樣設(shè)計(jì)合理嗎 |
評(píng)分
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點(diǎn)評(píng)
拆開你家車輪軸承看看,是什么軸承承受徑向力。。。。
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點(diǎn)評(píng)
這樣更好
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