55 / | HD | GAS SEPARATION |
282 | DF | WITH NONLIQUID CLEANING MEANS FOR SEPARATING MEDIA {13} |
282.2 | DF | .~ With heating or cooling means {2} |
282.4 | DF | .~.~ Two confined fluids in indirect contact {1} |
282.5 | .~.~.~ Heat exchanger is part of separator or is contiguous therewith |