| 422 / | HD | CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING |
| 129 | DF | CHEMICAL REACTOR {28} |
| 224 | DF | .~ Including internal mixing or stirring means {2} |
| 225 | ![]() | .~.~ Mechanical type stirring means {4} |
| 226 | DF | .~.~.~> In positive pressure reactor |
| 227 | DF | .~.~.~> Including a draft tube for internal recirculation |
| 228 | DF | .~.~.~> Including flow directing baffle attached directly to reaction chamber wall |
| 229 | DF | .~.~.~> Longitudinally extending spiral stirring means |