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Max. Od 3 Meter HDPE Twin-Wall Helix Pipe Extrusion Line, Find Details and Price about HDPE Twin-Wall Helix Pipe Extrusion Line Hollow Wall HDPE Winding Pipe Machine from Max. Od 3 Meter HDPE Twin-Wall Helix Pipe Extrusion Line - Qingdao Changjie Machinery Co., Ltd.