2824| 14
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CN共滲的鋼件4140,芯部硬度到55HRC對性能有什么影響? |
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點評
圓柱,中間有通孔,直徑120mm,長300
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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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