| 422 / | HD | CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING |
| 129 | DF | CHEMICAL REACTOR {28} |
| 168 | DF | .~ Waste gas purifier {5} |
| 176 | ![]() | .~.~ Including waste gas flow distributor upstream of reaction site and within reaction chamber modifying velocity profile of gas |