steel box culvert corrugated

steel box culvert corrugated
steel box culvert corrugated
the corrugated box culvert is the new type culvert, It is made of the corrugated plate and easy to assembled. They have the big cross section than the round one.

the corrugated box culvert is the new type culvert, It is made of the corrugated plate and easy to assembled. They have the big cross section than the round one.

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