| 摘要 |
A dual airlift device according to the present embodiment comprises: a base frame, which is installed on the bottom surface of an aquaculture farm; a first airlift device arranged on the upper side of the base frame; and a second airlift device arranged on the upper side of the base frame at a height lower than that of the first air lift device, wherein one of the first and second airlift devices, which is exposed to the water surface, can be operated selectively. |
