34 / | HD | DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS |
523 | DF | APPARATUS {40} |
179 | DF | .~ Stationary receptacle or tube with agitator or conveyor {3} |
181 | DF | .~.~ With gas or vapor flow for contact with treated material {1} |
182 | .~.~.~ Axial treated material feed type |