PP Double Wall Corrugated Pipe Machinery Line (SBG400) Qingdao Huasu Machinery Fabricate Co., Ltd. Base Info Model NO.:SBG400Product Type:PP PipeAutomation:AutomaticComputerized:ComputerizedCertification:CETrademark:HUASUSpecification:CE, ISO9000Origin:QingdaoHS Code:84779000 Description Pre:PP Double Wall Corrugated Pipe Extrusion Line (SBG500) Next:CE PVC/PP/PE Double Wall Corrugated Pipe Production Line (SBG 315)