... This PVC corrugated sheet extrusion line consists of conical double screw extruder, hanger-style flat ... anticorrosive, weather resistant, colorful and environment protective. The product is characterized by its semi transparence, bright ... the lifespan more than ten times. Application: Roofing for workshop, warehouse, market; Roofing for parking lot, corridor, passage, balcony; Clapboard of the road ...