​The duct is made by pressing galvanized steel strip into multiple corrugations through a series of cold forming processes. The product also has features such as good versatility, well-matched compatibility, and ease of use.Bridges, building construction, steel strand pre embedding, etc

The metal corrugated duct is made by winding and pressing galvanized steel strips into corrugated shapes. The product features excellent versatility, high interchangeability, well-matched compatibility, and ease of use.

The duct is made by pressing galvanized steel strip into multiple corrugations through a series of cold forming processes.The product also has features such as good versatility, well-matched compatibility, and ease of use.Post tensioned prestressed reinforced concrete bridges, reinforced concrete bridges, reserved holes for large-diameter anchor bolts, and embedded pipes for foundation pipelines of buildings or constructed walls