702 / | HD | DATA PROCESSING: MEASURING, CALIBRATING, OR TESTING |
1 | DF | MEASUREMENT SYSTEM IN A SPECIFIC ENVIRONMENT {6} |
33 | DF | .~ Mechanical measurement system {6} |
50 | DF | .~.~ Fluid measurement (e.g., mass, pressure, viscosity) {5} |
55 | .~.~.~ Liquid level or volume determination |