| 95 / | HD | GAS SEPARATION: PROCESSES | 
| 149 | DF | LIQUID CONTACTING (E.G., SORPTION, SCRUBBING, ETC.) {20} | 
| 216 | DF | .~ And deflection {4} | 
| 219 | DF | .~.~ Including rotation of liquid, gaseous fluid mixture, or gas-liquid mixture through 360 degrees in stationary apparatus {1} | 
| 220 |  | .~.~.~ With heating or cooling |