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為什么同步帶傳動(dòng)的自行車不能替代鏈傳動(dòng)的自行車,大家開動(dòng)腦筋聊聊看 |
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點(diǎn)評
后來發(fā)現(xiàn)有用同步帶做的自行車,很棒,寬度不是問題,帶里可以加鋼絲,拉不長。
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