| 摘要 |
Drainpipe comprising an outer pipe casing 1, which at the bottom or on the bottom side in the longitudinal direction is provided with a recess from which two partitions 3, 4 extend upwards so as, at the upper end, to be joined to the inner side of the pipe casing 1 by pitched-roof-like extensions 5, 6 of the partitions 3, 4. In the pitched-roof-like extensions, which are joined in a line to the inner side of the pipe casing 1, overflow openings are made in a mill-cutting operation. <IMAGE> |
