mechanical wear
121railroad — /rayl rohd /, n. 1. a permanent road laid with rails, commonly in one or more pairs of continuous lines forming a track or tracks, on which locomotives and cars are run for the transportation of passengers, freight, and mail. 2. an entire system… …
122Fuel injection — Fuel rail connected to the injectors that are mounted just above the intake manifold on a four cylinder engine. Fuel injection …
123Disc brake — Close up of a disc brake on a car On automobiles, disc brakes are often located with …
124printing — /prin ting/, n. 1. the art, process, or business of producing books, newspapers, etc., by impression from movable types, plates, etc. 2. the act of a person or thing that prints. 3. words, symbols, etc., in printed form. 4. printed material. 5.… …
125tribology — tribologist, n. /truy bol euh jee, tri /, n. the study of the effects of friction on moving machine parts and of methods, as lubrication, of obviating them. [1965 70; TRIBO + LOGY] * * * Study of the interactions of sliding surfaces. It includes… …
126Archery — competition in West Germany in the early 1980s …
127Forging — This article is about the metalworking process. For specific hot forging hearth, see forge. For the act of counterfeiting, see forgery. Hot metal ingot being loaded into a hammer forge Forging is a manufacturing process involving the shaping of… …
128Ceramic materials — Ceramic Si3N4 bearing parts Ceramic materials are inorganic, non metallic materials and things made from them. They may be crystalline or partly crystalline. They are formed by the action of heat and subsequent cooling.[1] Clay was one of the… …
