Synthetic resin corrugated pipe having a concave-convex surface

Details Synthetic resin corrugated pipe having a concave-convex surface Synthetic resin corrugated pipe having a concave-convex surface

F - Mech Eng,Light,Heat,Weapons

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F16L 9/127 (2006.01) F16L 9/00 (2006.01) F16L 9/06 (2006.01) F16L 25/00 (2006.01) G02B 6/44 (2006.01)

Patent

CA 2169432

A synthetic resin corrugated pipe includes a pipe wall having an annularly- or helically-shaped convex-concave surface. The convex-concave surface has a plurality of convex portions having a quadrangular cross-sectional shape and a plurality of concave portions having a circular cross-sectional shape.

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