702 / | HD | DATA PROCESSING: MEASURING, CALIBRATING, OR TESTING |
FOR 134 | DF | MEASURING, TESTING, OR MONITORING (364/550) {3} |
FOR 135 | DF | .~ Measuring and evaluating (e.g., performance) (364/551.01) {5} |
FOR 140 | .~.~ Particle count, distribution, size (364/555) |