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軸承的生產(chǎn)過(guò)程 |
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點(diǎn)評(píng)
就算新廠(chǎng),機(jī)械上也會(huì)有灰的,那是車(chē)加工和磨加工產(chǎn)生的,和油混在一起,就成那樣了。
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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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