73 / | HD | MEASURING AND TESTING |
488 | DF | SPEED, VELOCITY, OR ACCELERATION {29} |
514.01 | DF | .~ Acceleration determination utilizing inertial element {8} |
514.02 | DF | .~.~ Angular acceleration {2} |
514.03 | .~.~.~ Fluid or fluent inertial mass (e.g., electrons, ions, plasma) |