Corrugated drainage pipe are made of carbon steel. Which is with circumferential corrugation have high load bearing capacity. Culverts built with this kind of pipe segments are called corrugated steel culverts. To prevent corrosion, corrug...>READ MORE
幸运飞艇1396j开奖记录we are a corrugated steel pipe trading company, Leading supplier and manufacturer of the corrugated steel pipe, corrugated steel culvert,corrugated metal pipe in China.