| 702 / | HD | DATA PROCESSING: MEASURING, CALIBRATING, OR TESTING |
| 1 | DF | MEASUREMENT SYSTEM IN A SPECIFIC ENVIRONMENT {6} |
| 19 | ![]() | .~ Biological or biochemical {2} |
| 20 | DF | .~.~> Gene sequence determination |
| 21 | DF | .~.~> Cell count or shape or size analysis (e.g., blood cell) |