There are two kinds of commonly used corrugated metal culvert: one is spiral corrugated metal pipe, one is the anular corrugated steel pipe.
1, Spiral corrugated metal pipe is a corrugated tube in tube shaped shell spiral arrangement.
2, Annular corrugated steel pipe is a pipe shaped shell with a closed circle. The anular corrugated steel pipe has the advantages of good elasticity, low rigidity, and good flexibility.
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