| 摘要 |
The pit (1) has a pipe (2,3), which is closed by a base (10) and has a middle-longitudinal-axis (25) and an inner diameter, and has two connections for waste water pipes. A flow channel is arranged between the connections. The flow channel consists of a rigid but flexible plate, whose smallest diameter with a length corresponds to the inner diameter. The pipe forming the pit is made of plastic. |
