本公司常年供应：Q345B方管.矩管 矩管 20# Q345 GB/T6728-2002 500x300x(8-14)mm 矩管 20# Q345 GB/T6728-2002 450x250x(8-14)mm 矩管 20# Q345 GB/T6728-2002 400x300x(8-14)mm 矩管 20# Q345 GB/T6728-2002 400x250x(6-14)mm 矩管 20# Q345 GB/T6728-2002 400x200x(6-14)mm 矩管 20# Q345 GB/T6728-2002 350x250x(6-14)mm 矩管 20# Q345 GB/T6728-2002 300x200x(5-14)mm 矩管 20# Q345 GB/T6728-2002 260x180x(5-14)mm 矩管 20# Q345 GB/T6728-2002 250x150x(4-12)mm 矩管 20# Q345 GB/T6728-2002 220x140x(4-12)mm 矩管 20# Q345 GB/T6728-2002 200x150x(4-10)mm 矩管 20# Q345 GB/T6728-2002 200x120x(4-10)mm 矩管 20# Q345 GB/T6728-2002 180x100x(4-10)mm 矩管 20# Q345 GB/T6728-2002 160x80x(4-8)mm 矩管 20# Q345 GB/T6728-2002 150x100x(4-8)mm 矩管 20# Q345 GB/T6728-2002 140x80x(4-7)mm 矩管 20# Q345 GB/T6728-2002 120x80x(3-6)mm 矩管 20# Q345 GB/T6728-2002 120x60x(3-6)mm 矩管 20# Q345 GB/T6728-2002 100x50x(3-5)mm 天津昊鸿钢管022－26916110 地址：天津市北辰区北仓道名都物资商城E座