Corrugated Pipes, Waterstops, Expansion Joints manufacturer / supplier in China, offering National Standard Certification for Buried PVC Waterstop, Solution for Basement Waterproofing Engineering, Hot Selling Galvanized 30 Corrugated Metal Pipe CMP Culvert Pipe, PVC Plastic Waterstop Has Good Flexibility and Is Easy to Weld. It Is The Preferred Product for Anti-Seepage of Channel Gates and so on.