6503| 18
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有沒(méi)有人提出過(guò)一種無(wú)摩擦軸承的概念? |
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點(diǎn)評(píng)
是的,現(xiàn)在主要用在陀螺上。
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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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