there must be some grit in the machinery
21Graphite — For other uses, see Graphite (disambiguation). Graphite Graphite specimen General Category Native element mineral …
22Bearing (mechanical) — A bearing is a device to allow constrained relative motion between two or more parts, typically rotation or linear movement. Bearings may be classified broadly according to the motions they allow and according to their principle of operation as… …
23ultrasonics — /ul treuh son iks/, n. (used with a sing. v.) the branch of science that deals with the effects of sound waves above human perception. [1930 35; see ULTRASONIC, ICS] * * * Vibrational or stress waves in elastic media that have a frequency above… …
24Moorestown Township, New Jersey — This article is about the Township of Moorestown in New Jersey. Other places in New Jersey with similar names are Morris Township, New Jersey and Morristown, New Jersey. Moorestown Township, New Jersey   Township   …
25Machinist — A machinist is a person who uses machine tools to make or modify parts, primarily metal parts, a process known as machining. This is accomplished by using machine tools to cut away excess material much as a woodcarver cuts away excess wood to… …
