422 / | HD | CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING |
50 | DF | ANALYZER, STRUCTURED INDICATOR, OR MANIPULATIVE LABORATORY DEVICE {11} |
68.1 | DF | .~ Means for analyzing liquid or solid sample {11} |
69 | DF | .~.~ Sorption testing {2} |
71 | .~.~.~ With radioactive material |