| 422 / | HD | CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING |
| 50 | DF | ANALYZER, STRUCTURED INDICATOR, OR MANIPULATIVE LABORATORY DEVICE {11} |
| 83 | DF | .~ Means for analyzing gas sample {6} |
| 88 | DF | .~.~ Including means for adsorbing or absorbing gas into or onto liquid or solid media {4} |
| 90 | ![]() | .~.~.~ With conductiometric detector |