F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
61/32, 189/66, 1
F16L 11/11 (2006.01) B26F 1/00 (2006.01) B29C 49/00 (2006.01) B29C 53/30 (2006.01) F16L 9/127 (2006.01) B29C 65/00 (2006.01)
Patent
CA 1065776
Abstract of the Disclosure A corrugated pipe, especially useful for drainage, is provided. The flanks of the corrugations have oppositely disposed inner walls which are connected to one another at least over a portion of their peripheries. A method for making this novel pipe; and an apparatus especially adapted for carrying out the method of the invention are disclosed.
277341
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