3419| 5
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Q235A,,Q345A為什么不用做沖擊試驗? |
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點評
Q235A恰恰是不保證化學成分,只保證力學性能,。
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小黑屋|手機版|Archiver|機械社區(qū) ( 京ICP備10217105號-1,,京ICP證050210號,,浙公網(wǎng)安備33038202004372號 )
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