(under the class definition) Subject matter in which a measurement or test is made involving any one or any combination of the operations of abrasion, milling, rubbing, or scuffing, even though the test is employed as an index of
another property, e.g., hardness. These are, in general, "wear" tests.
SEE OR SEARCH THIS CLASS, SUBCLASS:
9+, for analogous testing or measuring of frictional resistance, coefficient or characteristic.
862.12+, for torque absorption dynamometers of the frictional drag type.
SEE OR SEARCH CLASS
277, Seal for a Joint or Juncture, for a generic sealing means or process, 321, for a seal combined with means to indicate wear, proper seating, or presence.
434, Education, Demonstration, and Cryptography, for the demonstration of wear characteristics of materials not involving a measurement or a test feature.
