| 261 / | HD | GAS AND LIQUID CONTACT APPARATUS |
| 19 | DF | FLUID DISTRIBUTION {5} |
| 38 | DF | .~ Valved {8} |
| 42 | DF | .~.~ Multiple valves {5} |
| 43 | DF | .~.~.~ Connected {4} |
| 44.1 | DF | .~.~.~.~ Contact space {5} |
| 44.3 | ![]() | .~.~.~.~.~ Traversely reciprocating air or mixture valve {1} |
| 44.4 | DF | .~.~.~.~.~.~> Suction operated |