4897| 12
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求助,增加從動(dòng)輪直徑,主動(dòng)輪不變,齒是更容易斷還是相反 |
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點(diǎn)評(píng)
不是齒的強(qiáng)度變大,它還是它。不過(guò),不用那么賣(mài)力氣了而已吧。
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