| 摘要 |
<p>In the present invention, provided is a water drain for controlling water level used in a cultivating water tank, including a main water draining pipe coupled to a water discharging hole on a bottom floor in the cultivating water tank and a pipe for controlling water level coupled to the side of the main water draining pipe, thereby enabling users to rotate the pipe for controlling water level to as many as users want and sinking the other end part of the pipe for controlling water level into water in the cultivating water tank, discharging water where users control water level in the cultivation water tank based on the rotation, thereby increasing work efficiency because users can do other work while discharging water.</p> |
