| 210 / | HD | LIQUID PURIFICATION OR SEPARATION |
| 513 | DF | GRAVITATIONAL SEPARATOR {6} |
| 523 | DF | .~ Mechanical constituent mover {5} |
| 528 | | .~.~ Horizontally rotating scraper {3} |
| 529 | DF | .~.~.~> Polygonal container and correlating mover |
| 530 | DF | .~.~.~> Tank rim-supported carriage |
| 531 | DF | .~.~.~> Elevatable scrapers |