| 摘要 |
<p>The cleaning device (1) has a cleaning head (5) with at least one nozzle (11) rotating round a longitudinal axis (L). The cleaning head has a jacket (15) with a smooth external surface, in which a series of through holes (17) is formed, distributed round the circumference of the jacket and arranged relative to the nozzle so that a jet from the nozzle can pass through one of the holes, at least temporarily.</p> |
