1.unique structure 2.high automation 3.convient operation, 4.relaible continuous production HDPE,MDPE Diameter Water Supply,Gas Supply ... Production LineThe HDPE,MDPE Large Diameter Wter Supply Pipe,Gas Supply Pipe Extrsion Preoduction Line developed by our company ... system,extruder,die head,sizing and cooling system,hauling machine,planet cutting device,and turning rack.The extruder adopts enforced ...