| 摘要 |
The present invention relates to a drain trap installed in a drain. The drain trap of the present invention dually separates and filters foreign substances through a cover filtering large foreign substances by being installed on the upper part of a fuel oil body and a filter unit filtering small foreign substances by being installed at the lower side of the cover so as to filter all large and small foreign substances without clogging the drain trap as well as prevent the backflow of odors by an odor prevention device installed inside the fuel oil body. |
