... , roofing, commercial use ,household appliance,industry,family…SPECIAL APPLICATIONPPGI :wear resistant steel, high-strength-steel plate 2. Main PPGI products: 3.Product workshop and line ... unit, corrugated roof, roller shutter door, rainwater drainage pipe, retailer boothInsideDoor, doorcase, light steel roof structure, folding screen, elevator, stairway, vent gutterElectrical ...