... Co.,Ltd, we are one of the leading ppr machine, ppr pipe machinery, ppr pipe machine, ppr pipe production line manufacturers and suppliers.Single ... one or three extrudersfor co-extrusion,adopts PPR,PE or PP as main material,the middle layer is glassfiber or other ... technic from Germany and designed as the high efficient extruder according to the producing characteristics of PPR,PP,PE,PERT,PEX,PB, ...