| 209 / | HD | CLASSIFYING, SEPARATING, AND ASSORTING SOLIDS |
| 422 | DF | STRATIFIERS {6} |
| * | DD | .~ With pneumatic treatment {3} |
| * | | .~.~ Movable bed {4} |
| * | DD | .~.~.~> Permeable {2} |
| 470 | DF | .~.~.~> Belts |
| 471 | DF | .~.~.~> Chutes, tables, and receptacles {1} |
| 473 | DF | .~.~.~> Drums |