STEEL ROOFING MATERIAL 1.ISO 9001:2008; 2.ENTITY FACTORY, MILL, ... PLAIN STEEL PICTURE CERTIFICATE ISO9001:2008 STANDARDASTM A653, JIS G3302 SGCC/SGCH ,GB/T 2518, EUROPEAN STANDARDASTM A792, JIS ... T 1275…… GRADESS GRADE 33-80; SGCC, SGCH, SGCD1-SGCD3, SGC340-SGC570, SGCC, DX51D….GRADE 33-GRADE 80.;SGLCC SGLCD ... ANALYSIS 5. COMPANY SHOW 6. PACKING/PACKAGE STEEL ROOFING MATERIAL FOR CONSTRUCTION