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大家好!45#軟軸、45#硬軸和40Cr鍍鉻棒,,通過肉眼能分辨出來嗎?謝謝,! |
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小黑屋|手機(jī)版|Archiver|機(jī)械社區(qū) ( 京ICP備10217105號(hào)-1,京ICP證050210號(hào),,浙公網(wǎng)安備33038202004372號(hào) )
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