3663| 3
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一種類似球軸承,可以轉(zhuǎn)動(dòng),但轉(zhuǎn)動(dòng)后又會(huì)自己回正的簡單機(jī)械裝置 |
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Archiver|手機(jī)版|小黑屋|機(jī)械社區(qū) ( 京ICP備10217105號-1,京ICP證050210號,浙公網(wǎng)安備33038202004372號 )
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