(under the class definition) Subject matter for measuring or determining the frictional drag or resistance between solid bodies when moved relative to one another.
SEE OR SEARCH THIS CLASS, SUBCLASS:
7+, for testing or measuring by abrasion, milling, rubbing, or scuffing, i.e., "wear" tests.
862.11, through 862.18, for torque measuring dynamometers e.g., pony brakes.
