... Introduction1. Prepainted Steel Coil is coated with organic layer, which provides higher anti-corrosion property and a ... (Outside) workshop, agricultural warehouse, residential precast unit, corrugated roof, wall, rainwater drainage pipe, terrace, retailer booth, roller ... shutter door(Inside) door, doorcase, light steel roof structure, folding screen, ceiling, elevator, stairway, vent gutter2 ...