| Customization: | Available |
|---|---|
| After-sales Service: | Free Return of Parts |
| Warranty: | 12 Months |
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Metal bellows are metal pipes made of galvanized or non-galvanized low carbon steel with spiral folding bites and used for reserved holes in post-tensioned prestressed concrete structural members
1.used at working site,making duct at site,
2.operated easily, nimble structure, working steady
3.make round duct or flat duct
spiral prestressed corrugated pipe making machine
corrugated pipe making machine
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