34 / | HD | DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS |
282 | DF | PROCESS {24} |
329 | DF | .~ With contacting of material treated with solid or liquid agent {5} |
343 | DF | .~.~ With addition of heat to drying process {3} |
344 | .~.~.~ Treating agent consists of both solid and liquid |