... outer walls, ovens, explosive-proof steel,electrically controlled cabinets,galvanized tube/pipe, ceilingchannel,building material,galvanized wire steel tape Surface chromated, oiled,unoiled, zero spangle ... Widely used for roofs, outer walls, ovens, explosive-proof steel,electrically controlled cabinets,galvanized tube/pipe, ceilingchannel,building material,galvanized wire steel tape