73 / | HD | MEASURING AND TESTING |
53.01 | DF | LIQUID ANALYSIS OR ANALYSIS OF THE SUSPENSION OF SOLIDS IN A LIQUID {15} |
54.01 | DF | .~ Viscosity {11} |
54.11 | .~.~ Orifice, nozzle, or extrusion means {3} | |
54.12 | DF | .~.~.~> Plural fluids (e.g., comparison) |
54.13 | DF | .~.~.~> By time interval of travel or flow rate measuring |
54.14 | DF | .~.~.~> By force, pressure, or displacement measuring |