| 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 |