| 702 / | HD | DATA PROCESSING: MEASURING, CALIBRATING, OR TESTING |
| 1 | DF | MEASUREMENT SYSTEM IN A SPECIFIC ENVIRONMENT {6} |
| 22 | DF | .~ Chemical analysis {6} |
| 23 | DF | .~.~ Quantitative determination (e.g., mass, concentration, density) {3} |
| 25 | ![]() | .~.~.~ Liquid mixture (e.g., solid-liquid, liquid-liquid) |