... GB, ASTM... ISO9000; 2), Exquisite surface; 3), Steady structure; 4), Low cost, high benefit. 1), Comply with GB, ASTM,....ISO9000;2), Exquisite ... surface;3), Steady structure;4), Low cost, high benefit.5), Excellent design team6), Strict quality control 7), Manufacture according to the ... 's requirements)9), Good market reputation for all kinds of steel structure buildling.