3179| 8
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請教錐形孔的加工, 因本廠無小型卷板機, 且批量小 |
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點評
我說的是直徑190展開應該是直線,
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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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