| 摘要 |
A cleaning arm (6) mounted on and movable along a guide extends at right angles to the latter and has a number of spray devices (7) mounted on it for spraying liquid onto the surface (10) to be cleaned. At least one wiper (13) is also mounted on the arm and can be rotated between a position in contact with the surface being cleaned and a position where it is raised clear of this surface. |
