34 / | HD | DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS |
282 | DF | PROCESS {24} |
443 | DF | .~ Gas or vapor contact with treated material {17} |
444 | DF | .~.~ Sheet, web, or strand {7} |
448 | DF | .~.~.~ Vapor or gas treatment {2} |
449 | .~.~.~.~ Condensation of gas or vapor |