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