... , compressed air transportation, etc. During the developing history, the PP-R\PE\PP\PE-RT pipe is the latest product, has the advantages ... die head are specially designed according to the properties of PP-R\PE\PP\PE-RT material. The electrical control uses frequency control ... . This production line adopts two or three extruders co-extrusion crafts, uses PP-R\PE\PP\PE-RT as main material, and glass fiber ...