... pipe line,PVC pipe line) PE/PVC Double-wall corrugated pipe extrusion line (corrugated pipe line,PE pipe line, PVC pipe ... related auxiliary equipment equipped after slightly revising the PE double-wall corrugated pipe extrusion line.Main uses: drainage in cities ... discharging duct,cabling protection, etc. PE/PVC Double-wall corrugated pipe extrusion line(corrugated pipe line,PE pipe line,PVC pipe line ...