| 261 / | HD | GAS AND LIQUID CONTACT APPARATUS |
| 75 | DF | CONTACT DEVICES {11} |
| 119.1 | | .~ Liquid tank {5} |
| 119.2 | DF | .~.~> Carburetor |
| 120 | DF | .~.~> Floating distributor |
| 121.1 | DF | .~.~> Submerged blast {5} |
| 125 | DF | .~.~> Multiple receptacle |
| 126 | DF | .~.~> Upflowing gases |