| 摘要 |
A drainage trench is provided to efficiently prevent backflow of bad smell from outside or collecting container during the exhaust of bad smell. A drainage trench(100) for preventing backflow of bad smell comprises a trench body(200) in which a flange(230) with a stepped part(260) and a drain hole(400) connected to a collecting container and a drain pipe are formed, a cover having a plurality of drain grooves on the upper side, and a backflow prevention member(500) which is placed in a receiving part(220) of the trench body in order to prevent bad smell from flowing in through the drain hole. |
