| 34 / | HD | DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS |
| 523 | DF | APPARATUS {40} |
| 192 | DF | .~ Removable shelf or tray type {4} |
| 195 | DF | .~.~ With gas or vapor circulation for contact with treated material {3} |
| 197 | ![]() | .~.~.~ With heater {1} |
| 198 | DF | .~.~.~.~> With liquid heater or vaporizer |