210 / | HD | LIQUID PURIFICATION OR SEPARATION |
600 | DF | PROCESSES {14} |
767 | DF | .~ Separating {16} |
800 | DF | .~.~ Utilizing gravitational force {3} |
801 | .~.~.~ Including change of mainstream flow direction {1} | |
802 | DF | .~.~.~.~> Utilizing parallel separation passages |