| 422 / | HD | CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING |
| 129 | DF | CHEMICAL REACTOR {28} |
| 198 | DF | .~ Including heat exchanger for reaction chamber or reactants located therein {6} |
| 200 | DF | .~.~ Indirect heat-exchange tube within reaction chamber with a nonreactant heat-exchange fluid passing therethrough {1} |
| 201 | | .~.~.~ Tube and shell type |