| 摘要 |
PURPOSE: A flow pass variable drainage inspection hole, which includes a connection pipe, is provided to change a drainage path direction by adjusting an inner space. CONSTITUTION: A flow pass variable drainage inspection hole comprises a box type main body(110) and a connection pipe(120). The box type main body has an open top shape. The box type main body comprises an inlet port(111), a first outlet port(112), and a second outlet port(113). The connection pipe is formed to be cut. The connection pipe is installed between the inlet port and the first outlet port. |
