73 / | HD | MEASURING AND TESTING |
488 | DF | SPEED, VELOCITY, OR ACCELERATION {29} |
514.01 | DF | .~ Acceleration determination utilizing inertial element {8} |
514.05 | DF | .~.~ Fluid or fluent material {4} |
514.12 | .~.~.~ Fluid or fluent material dampening of an inertial element {1} | |
514.13 | DF | .~.~.~.~> Gas |