| 摘要 |
<p>The invention concerns a device comprising a suction head (5) located on one side of the obstacle (1) and a blowing head (6) located on the other side of the obstacle (1), the cross section of the suction orifice (5b) being greater than that of the blowing orifice (6b). The invention is characterised in that it comprises nozzles (7) for spraying pressurised liquid arranged over the major part or the whole of the air blowing orifice (6b) periphery, these jets being directed so as to spread over the major part or the whole of the air flux zone periphery between the blowing and suction orifices (6b, 5b).</p> |
