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在外徑6毫米的精密焊管上沖4.8左右的孔 ,變形量大概有多少? |
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小黑屋|手機版|Archiver|機械社區(qū) ( 京ICP備10217105號-1,京ICP證050210號,浙公網安備33038202004372號 )
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