| 96 / | HD | GAS SEPARATION: APPARATUS |
| 424 | DF | WITH TIMING OR CHANGEABLE PROGRAMMING MEANS {2} |
| 425 | DF | .~ Of cleaning mechanism for separating media {2} |
| 426 | ![]() | .~.~ Sequential cleaning of plural separating media {1} |
| 427 | DF | .~.~.~> Multiple bag-type filters in chamber |