96 / | HD | GAS SEPARATION: APPARATUS |
15 | DF | ELECTRIC FIELD SEPARATION APPARATUS (E.G., ELECTRICAL PRECIPITATOR, ELECTROSTATIC TYPE, ETC.) {17} |
75 | DF | .~ Plural diverse electric fields {2} |
77 | .~.~ Serially arranged ionizing and collecting or agglomerating fields {1} | |
78 | DF | .~.~.~> Adjacent parallel collector electrodes are differently charged {1} |