| 96 / | HD | GAS SEPARATION: APPARATUS |
| 424 | DF | WITH TIMING OR CHANGEABLE PROGRAMMING MEANS {2} |
| 425 | ![]() | .~ Of cleaning mechanism for separating media {2} |
| 426 | DF | .~.~> Sequential cleaning of plural separating media {1} |
| 428 | DF | .~.~> For control of pneumatic reverse flushing |