成都[攀钢]产20# 45# 大无缝 GB/T81631999包钢 20#GB3087 45# YB2000 203*25/28/30/35/40 168*8/10/12/16/18/20 219*35/30/32/33/40 180*7/8/10/12/16/18/22 219*45/48/50/55 194*7/8/9/10/12/14/18/20 245*30/32/33/36/40 219*6.5/7/8/9/10/12/14 245*45/48/50 219*16/18/20/22/25/28 273*30/32/36/40/45 232*16/18/20/23 273*48/50/50/55/60 245*8/9/10/12/16/18 299*28/30/32/35/38 245*19/20/22/25/27/30 299*40/45/50/55 273*6.5/7/8/9/10/12/14 325*30/32/35/38/40/45/50/55 273*16/18/20/22/25/28 351*30/32/36/38/40/45 299*10/12/14/16/18/20 351*50/55/75/135 299*22/24/25/28/30 377*32/35/36/40/45/55 325*8/9/10/14/16/18 380*28/30/32 325*20/22/25/28/30 406*28/35/40/45/50/55 351*10/12/14/16/18/20 426*28/30/32/35/38/40 351*22/25/28/30 450*20/22/23/25/28/30 377*10/11/12/14/16/18 457*22/24/28/30/50 377*20/22/25/28/30 465*24/28/32 402*12/14/16/18/20/26 530*25/26/28/30 426*10/11/12/13/14/16/18/20/22/25