Plastic steel doors and windows are loved by people for their beautiful appearance, Korrosionsbeständigkeit, Korrosionsbeständigkeit, waterproof, Wärmedämmung, easy maintenance and other advantages, and are recognized as the best energy-saving doors and windows. Steel plastic doors and windows are rods (Profiles) made of PVC (PVC) resin and more than ten kinds of additives and extruded by extruder and …