(under the class definition) Apparatus comprising means providing distinct chambers or areas for solid-liquid contact with means for circulating granular separatory material between at least two of the chambers.
SEE OR SEARCH THIS CLASS, SUBCLASS:
268, for a separator having means providing gravity flow of particles therethrough.
270, for moving rehabilitation means which pick up and redeposit particles on the same bed.
271+, for surface traversing rehabilitation means for a particulate material bed.
