| 261 / | HD | GAS AND LIQUID CONTACT APPARATUS |
| 75 | DF | CONTACT DEVICES {11} |
| 119.1 | DF | .~ Liquid tank {5} |
| 121.1 | | .~.~ Submerged blast {5} |
| 121.2 | DF | .~.~.~> Minnow bucket |
| 121.3 | DF | .~.~.~> Carburetor vented nozzle {1} |
| 122.1 | DF | .~.~.~> Submerged screen {1} |
| 123 | DF | .~.~.~> Submerged baffle |
| 124 | DF | .~.~.~> Multiple jet |