6439| 22
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20的軸用201不銹鋼與碳鋼+鍍鉻哪個成本低? |
點評
就幾件
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點評
加工的話硬鉻層豈不是去掉啦
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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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