63-1200mm HDPE/PVC Double Wall Corrugated Pipe Extrusion Line 16-1600mm HDPE Gas and Water Pipe Extrusion Line 200-3000mm Spiral Hollow Wall Pipe Extrusion Line 16-630mm PVC Pipe Extrusion Line 16-160mm PP-R Pipe Extrusion Line Aluminum Plastic Composite Pipe Production Line PVC foam Pipe Extrusion Line Cross-link HDPE Pipe Extrusion Line Super Noiseless Pipe Extrusion Line PVC Fibre Reinforced Hose Extrusion Line PVC Spiral Steel Wire Reinforced Hose Extrusion Line Telecommunication Jacket Pipe Extrusion Line Single Wall Corrugated Pipe Extrusion Line PVC Spiral Helix Reinforced Hose Line HDPE Plumbago Reinforced Spiral Pipe Extrusion Line PP straw extrusion line