34 / | HD | DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS |
523 | DF | APPARATUS {40} |
524 | DF | .~ With automatic control {11} |
526 | DF | .~.~ Of plural operations {3} |
535 | DF | .~.~.~ Having two of heater, contacting gas humidity, or gas mixing {7} |
536 | .~.~.~.~ With weight measuring means |