锅炉管 14 18X2 4 ST45.8-Ⅲ 20G GB5310-95 锅炉管 18 20X3 4 ST45.8-Ⅲ 20G GB5310-95 锅炉管 22 25.4X2.5 4 5 ST45.8-Ⅲ 20G GB5310-95 锅炉管 28 31.6X2.5 5 6 8 ST45.8-Ⅲ 20G GB5310-95 锅炉管 38 42X3 5 6 8 10 ST45.8-Ⅲ 20G GB5310-95 锅炉管 48 51X4 5 7 8 10 ST45.8-Ⅲ 20G GB5310-95 锅炉管 54 57 60X3 4 5 8 10 ST45.8-Ⅲ 20G GB5310-95 锅炉管 73 76X4 7 8 10 12 16 ST45.8-Ⅲ 20G GB5310-95 锅炉管 80 89X4.5 6 8 10 12 20 ST45.8-Ⅲ20GGB5310-95 锅炉管 95 102X6 8 10 18 ST45.8-Ⅲ 20G GB5310-95 锅炉管 108 114X6 8 12 16 20 25 ST45.8-Ⅲ 20G GB5310-95 锅炉管 127 133X5 8 10 16 25 ST45.8-Ⅲ 20G GB5310-95 锅炉管 140 146X6 8 10 20 23 25 ST45.8-Ⅲ 20G GB5310-95 锅炉管 159 168X5 6 10 18 20 25 ST45.8-Ⅲ 20G GB5310-95 锅炉管 194 219.1X7 8 10 12 20 ST45.8-Ⅲ 20G GB5310-95 锅炉管 273 323.9X7 10 16 20 45 ST45.8-Ⅲ 20G GB5310-95 锅炉管 355.6 377X10 16 20 30 45 ST45.8-Ⅲ 20G GB5310-95 锅炉管 406.4 426X10 16 25 30 35 ST45.8-Ⅲ 20G GB5310-95 锅炉管 480 508X11 16 20 28 45 60 ST45.8-Ⅲ 20G GB5310-95 锅炉管 533.4 588.8X12 16 30 45 60 ST45.8-Ⅲ 20G GB5310-95 锅炉管 609 619X16 18 20 45 60 70 ST45.8-Ⅲ 20G GB5310-95