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跪求冷軋鋼 FE 490F 或FE 50是那個(gè)國家的材料,對(duì)應(yīng)國標(biāo)是什么材料? |
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Archiver|手機(jī)版|小黑屋|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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