http://www.corrugatedsteelpipe.orgExport Departmentli liPhone: 86 - 318 - 53212121/86 - 8653212121Fax: 86 - 318 - 8653212121
NO.22 Ronghua street, Hengshui, Hebei, China.hengshui, COChina, 053600Web Page Link: https://www.toboc.com/greatwallcorrugatedsteelpipecoltd.aspx
Spiral rib pipe can solve your storm water problems with the improved hydraulics
Spiral rib pipe is our innovative flexible metal pipe that combines the proven strength of corrugated metal pipe with the flow capacity of a smooth inner wall. That is to say the product has two layers: the first layer is a smooth interior corrugated steel pipe and the second layer is a smooth steel liner providing for improved hydraulics.
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Great Wall Corrugated Steel Pipe Co., Ltd.