语言选择：
标准: BS 1387-1985, ASTM A53, ASTM A513,
ASTM A252-98, JIS G3444-2004 STK400/500
G3452-2004, EN 10219, EN 10255-1996, DIN 2440,
GB/T13793-2008
材质: Q195, Q235, Q275, Q345，X42-X52
规格: 1/2”-16”(OD:21.3mm-660mm)
壁厚:1.0mm-12mm
Surface treatment: Galvanized, oil coating, lacquering
