3369| 17
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方鋼鋼管上形成螺孔 |
點評
你是說大師級的不應該不懂,是吧?
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點評
可以考慮沖壓工藝-刺破翻孔。然后攻牙。不過需要壓機和做個小模具
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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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