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求教 攻絲機(jī)攻6個(gè)的盲孔絲錐為什么總是折斷 |
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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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