"Secondary steel GI,EG, CR, HR. HDG, PPGI, CRNGO, steel sheet and coil”其中的“GI, EG,CR, HR, HDG, PPGI, CRNGO”是什么意思?或者说代表了钢材方面的那种材质吗?急!

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Secondary steel GI,EG, CR, HR. HDG, PPGI, CRNGO, steel sheet and coil”其中的“GI, EG,CR, HR, HDG, PPGI, CRNGO”是什么意思?或者说代表了钢材方面的那种材质吗?急! GI STEEL COIL 和 PO STEEL COIL 和EG STEEL COIL Galvanized steel coil和 GI Sheet有什么区别? secondary secondary secondary gi secondary over-rolled steel sheet 我们的钢牌号是Q195,是几级钢? steel steel steel steel 求管件类型英语翻译快Now, I am looking for carbon steel: HR CR GA GI EG ETP coil, sheet, round bars, pipe, HMS1/2, HMS1, used rails, etc AYJackson Secondary secondary是什么意思 secondary是什么意思 secondary是什么意思 secondary effect secondary effect是什么意思