| 210 / | HD | LIQUID PURIFICATION OR SEPARATION |
| 348 | DF | FILTER {25} |
| 359 | DF | .~ Movable medium {12} |
| 360.1 | DF | .~.~ Centrifugal extractor {12} |
| 369 | | .~.~.~ Discharging residue {3} |
| 370 | DF | .~.~.~.~> Secondary motion of filter medium |
| 371 | DF | .~.~.~.~> With variable flow controller |
| 372 | DF | .~.~.~.~> By residue engaging means {3} |