27228| 23
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發黑處理、調質處理、熱處理的區別 |
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點評
哪種都不能,高頻可增加耐磨性
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點評
Quench—Polish-Quench
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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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