Plastic steel doors and windows are loved by people for their beautiful appearance, коррозионная стойкость, коррозионная стойкость, waterproof, теплоизоляция, 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 (ПОЛИВИНИЛХЛОРИД) resin and more than ten kinds of additives and extruded by extruder and …