4412| 11
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有大神能幫忙看看這個產品的加工工藝嗎 |
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點評
熱處理之后硬度這么高,怎么加工?
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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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