3172| 2
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請(qǐng)問碳當(dāng)量是不是只在鋼材焊接時(shí)計(jì)算,像鋁合金這類不計(jì)算碳當(dāng)量 |
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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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