Prestressed Post tensioning spiral concrete construction Galvanized Sheet Spiral Ducting Corrugated
corrugated pipe machine a kind of equipment for producing pre-stressed concrete reserved tunnel metal bellows makes the galvanized steel strip coil into four wave shape then undercuts and swages to apply the bellows, Which With high efficiency and Small volume, Easy operation and maintenance, convenient and speed adjustable. It is suitable for centralized use at construction sites and factories.
With ou...