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20鋼滲碳至46-50HRC容易控制嗎?42CrMo高頻淬火46-50HRC容易控制嗎? |
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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