| 34 / | HD | DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS |
| 523 | DF | APPARATUS {40} |
| 108 | DF | .~ Rotary drums or receptacles {7} |
| 110 | DF | .~.~ External {6} |
| 113 | | .~.~.~ Plural {5} |
| 114 | DF | .~.~.~.~> Gas or vapor circulation for contact with treated material {1} |
| 116 | DF | .~.~.~.~> With belts or felts {2} |
| 119 | DF | .~.~.~.~> Heat exchange fluid supply and/or removal |
| 120 | DF | .~.~.~.~> Threading, stripping, or guiding devices |
| 121 | DF | .~.~.~.~> Mounting and/or driving means |