... :6-120Width:1400-4100Length:6000-28000GB/T3274-2007Steel structure,city buiding,mechanical productionLow alloy steel plateQ345A,B,C,D,E Q390A,B ... :6-120Width:1400-4100Length:6000-28000GB/T3274-2007Steel structure,city buiding,mechanical productionFine carbon structure steel plate10-55#,20Mn,50MnThickness:6-120Width:1400 ...