| 摘要 |
Rotatably arranged distribution plate (1) has on its surface (4) a concave or convex shape which can be adjusted to change the desired distribution area. Preferred Features: The distribution plate is designed so that a central region of the plate can be fixed in a position which is set back or protrudes from a peripheral edge region of the plate. The distribution plate has an elastically deformable surface. The distribution plate can be adjusted by a hydraulic, electric, or pneumatic drive, or manually adjusted.
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