34 / | HD | DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS |
523 | DF | APPARATUS {40} |
184 | .~ Rotary or swinging carrier or rack {3} | |
185 | DF | .~.~> With agitating means or discharging scrapers |
186 | DF | .~.~> Plural rotary or swinging units |
187 | DF | .~.~> With gas or vapor circulation for contact with treated material {1} |