| 摘要 |
<p>12 Method and device for controlled motion of water in water basins Device for aerating and/or mixing water in a basin, using a means to impart a rotational motion to the water and having guide means (57) which convert the rotational motion into a combined horizontal and vertical motion of the water. Said guide means can be screw-shaped or plate-shaped elements of suitable shape and dimensions. (Fig. 4)</p> |
