... of hot dipped galvanized, galvalume, prepainted steel products, corrugated steel sheet, etc. Operate Standard:ASTM A653M ... effect, strong anti-corrosion ability, galvanized steel coils and sheets are also pollution-free and ... doorcase, light steel roof structure, folding screen, elevator, stairway, vent gutterElectrical applianceRefrigerator, washer, switch cabinet, instrument cabinet, air conditioning ...