4935| 11
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求教:一個(gè)靜止的齒輪和一個(gè)轉(zhuǎn)動(dòng)的齒輪怎么相嚙合呢? |
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Archiver|手機(jī)版|小黑屋|機(jī)械社區(qū) ( 京ICP備10217105號(hào)-1,京ICP證050210號(hào),浙公網(wǎng)安備33038202004372號(hào) )
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