| 摘要 |
An apparatus for cleaning a surface comprising an elongate air plenum (2) rotatably mounted beneath a cover (4) for rotation about an axis perpendicular to a longitudinal axis of the air plenum, said air plenum being connectable to a source of pressurised air and being provided with at least one first air outlet directing pressurised air at and in a direction substantially perpendicular to a surface to be cleaned. |
