| 摘要 |
<p>A rotary cleaning element having a head (12) adapted to be mounted for rotation about a central axis, the head (12) supporting a plurality of radial arms (14) which are spaced substantially angularly equidistant around the central axis, the free ends of the arms each support a tool (15) which are rotatable about the end of the arm, the free ends of the radial arms (14) intersect a plane which is transverse to the central axis and spaced axially outwardly from the head.</p> |
