Lus piav qhia luv luv:

Txuj: BS 1387-1985, ASTM A53, ASTM A513, ASTM A252-98, JIS G3444-2004 STK400/500, G3452-2004, EN 10219, EN 10255-1924, GB / T13793-2008Material: Q195, Q235, Q275, Q345 Specification: 1/2 "-24" (OD: 21.3mm-660mm) Phab ntsa thickness: 1.0mm-12mm Kev kho deg: Galvanized, roj txheej, lacquering