Corrugated Pipes, Waterstops, Expansion Joints manufacturer / supplier in China, offering Corrugated Culverts Be Used as Drainage Channels and Channels Across Railway Roadbeds and Other Construction Aspects, HDPE Composite Geomembrane with Two Fabrics and One Membrane Structure, Optimized for Agricultural Irrigation and Tailings Treatment, Customizable Assembled Culvert Pipe Oval Shaped Steel Road Corrugated Metal Pipe and so on.