Jun. 22, 2016
1.culvert corrugated metal pipe material:SS400 or Q235
4.corrugated parameters :corrugated from the (p) x corrugated depth (D)(mm) 68x13 76x25 125x 25 150x50 200x55
5.anti-corrosion treatment :hot dip galvanized ≥ 63 µm second preservcotive (usually by coating asphalt)
6.Using the life:≥100 years
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