6877| 15
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長條工件加工工藝請教 |
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點評
毛胚內應力,加工內應力是必須要消除的
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小黑屋|手機版|Archiver|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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