34 / | HD | DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS |
523 | DF | APPARATUS {40} |
60 | DF | .~ For diverse operations on treated material {4} |
69 | DF | .~.~ Diverse types of liquid removers only {2} |
71 | .~.~.~ With means to remove liquid from treated material by contact with solids |