7193| 16
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這個主軸的工藝孔 |
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點評
螞蟻大俠謙虛了,是不是問題太簡單,太常識?
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點評
18的鉆頭打孔,然后電火花加工成20的內孔??
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Archiver|手機版|小黑屋|機械社區 ( 京ICP備10217105號-1,京ICP證050210號,浙公網安備33038202004372號 )
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