| 422 / | HD | CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING |
| 129 | DF | CHEMICAL REACTOR {28} |
| 150 | DF | .~ Pigment or carbon black producer {4} |
| 152 | DF | .~.~ With particulate product collecting surface and means mechanically removing product therefrom {1} |
| 153 | DF | .~.~.~ Moving collecting surface {1} |
| 154 | | .~.~.~.~ Rotary collecting surface {1} |
| 155 | DF | .~.~.~.~.~> Disk or plate |