4671| 15
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如何減少設備打齒現象 |
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點評
20CrMnTi,不好用35CrMo、42CrNiMo之類
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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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