3030| 7
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16Mn能否用無縫鋼管代用 |
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點評
看具體應(yīng)用了,,對材料的主要性能要求是什么,,然后對比一下看能否滿足
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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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