| 摘要 |
<p>The device according to the invention relates to a rotor that can be rotated in at least one direction of rotation about a vertical axis of rotation, which rotor is provided with at least one guide member and at least one impact member, the take-off location of which guide member is displaced, when wear occurs along the guide surface, in such a way that the material is directed from a said displaced take-off location into a spiral path that is oriented essentially transversely or remains oriented essentially transversely to the impact surface of the impact member that is associated with the guide member.</p> |
