2520| 9
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齒輪輪系怎么搞? |
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點(diǎn)評(píng)
考研考機(jī)械設(shè)計(jì)機(jī)械原理這兩門課的話,這只是最簡(jiǎn)單的第一題
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點(diǎn)評(píng)
有,才學(xué)到齒輪齒厚那部分
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