| 摘要 |
The screen comprises a number of fixed and spaced apart bars (4) and a number of movable bars (6) located in between. The movable bars can be moved backwards and forwards in a linear manner in a direction parallel to the fixed bars. Fixed fins (5) and transport devices (11) are provided on the fixed bars, the transport devices having a cleaning effect and being provided with a surface (16) which is concave in the transport direction and with a preferably convex or concave surface (15) in the return direction. |
