Corrugated Pipes, Waterstops, Expansion Joints manufacturer / supplier in China, offering Bridge Expansion Joint Gqf-C Type E Type F Type 160 Type Comb Plate Highway Expansion Joint, Roadbed Steel Corrugated Pipe Corrugated Culvert Highway Culvert Assembled Pipe, Galvanized Bridge Culvert Tunnel Reinforcement Corrugated Steel Plate Municipal Highway Urban Drainage Steel Corrugated Pipe and so on.