| 摘要 |
<p>An oxygenation unit (5) (similar to those used in oxygenation tanks) is made fast to a sinkable craft (2) and connected by means of a pipe network (10) to a tow-boat (1) on which blowing means (compressor, blower (4)) are provided; said craft (2) is towed by said boat (1) to the area to be purified, where it is sunk and blowing is carried out until the desired level of oxygenation is achieved, after which the craft (2) is re-floated. In particular the craft (2) can be sunk by means of tanks (7) that can be selectively filled with air or water, a pump (3) being provided on the tow-boat (1) in this case, with the relative pipes (11, 12) connecting it with the craft (2).</p> |
