| 摘要 |
The piece has a base portion (17) arranged on a drainage pipe, and a rising portion that extends upward from the base portion. The rising portion has rising walls (5, 6) extending parallel to each other in a manner to form a drainage channel (18). The channel has an outlet (11) providing access to the pipe. The base portion includes a hollow chamber (14) in open communication with the rising portion, and is applied by shifting with respect to the rising portion. The wall (5) has a common edge (19) with a partition from the chamber, and thickness increasing in a direction of the edge. |
