| 摘要 |
For the purpose of sealing the annular gap between a cutting arm (2) and cutting heads (6) rotatably supported on this cutting arm (2), a main sealing (12) and an additional sealing element (13) is provided. The area of the annular gap (17) is rinsed by water flowing from the gap in outward direction, the water supply conduit (18) opening into the outward area, being designed as a labyrinth, of the gap (7) via a nozzle (17) (FIG. 3). |
