| 34 / | HD | DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS |
| 523 | DF | APPARATUS {40} |
| 201 | DF | .~ Houses, kilns, and containers {6} |
| 203 | DF | .~.~ With conveyors providing plural or zigzag treated material paths {5} |
| 205 | ![]() | .~.~.~ Plural independent paths for treated material |