| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rainwater drainage system with less construction labor than ever before that inhibits mosquito breeding. <P>SOLUTION: A rainwater drainage system 1 comprises a rainwater permeation tank 10, a filter vessel 20 having a bucket 25 as a soil storage part, and an orifice vessel 30 having an orifice member 33. An inflow port 31a of the orifice vessel 30 is connected to a discharge port 12 of the rainwater permeation tank 10 through a pipe 53, and an outflow port 31b is connected to a rainwater main pipe 50 through a pipeline 61. The orifice vessel 30 has no soil storage part extending below the bottoms of the inflow port 31a and the outflow port 31b. <P>COPYRIGHT: (C)2012,JPO&INPIT |
