| 34 / | HD | DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS |
|
| 523 | DF | APPARATUS {40} |
| 201 | DF | .~ Houses, kilns, and containers {6} |
| 209 | DF | .~.~ Plural treating units or compartments {1} |
| 210 |  | .~.~.~ With gas or vapor circulation for contact with treated material {5} |
| 211 | DF | .~.~.~.~> Superposed floors or chambers |
| 212 | DF | .~.~.~.~> Recirculation of treating gas or vapor {1} |
| 214 | DF | .~.~.~.~> Parallel circulation only |
| 215 | DF | .~.~.~.~> With heater {1} |
| 217 | DF | .~.~.~.~> With conveyor and/or movable treated material support |