| 摘要 |
PURPOSE: A waterproof manhole comprising a drain unit is provided to enable height and an angle to be easily controlled even if the height of a manhole is not different from that of the ground surface. CONSTITUTION: A waterproof manhole comprising a drain unit is as follows. Valves for drain and water supply, and an electrical or telegraphic booth box pass through a first lower part. A first upper part is coupled to the first lower pat. One side of an operator(300) is connected to a valve in the box passing through the first lower part. The operator passes through the first upper part and is located on the first upper part. One side of an operator protecting pipe(310) is connected to the first upper part and the other side of the operator protecting pipe is connected to a second manhole cover on the ground. |
