... wall corrugated pipe machine 1.pipe size: ID90-250mm 2.horizontal corrugator, water cooling, aluminum mould block SBG250 HDPE/PP Double Wall ... and guarantee high efficiency extrusionDie head: it has two channel structure, nitriding and polishing handling, special designed mouth ... PLC control system, 15 "large color touch screen human-machine interface, high automation, reliable running, easy operation, ...