case-hardened steel
121NCR-340 — The NCR 340 was NCR s first line High Speed 300 line per minute computer printer. It used a 3 inch diameter (76 mm) drum made up of 120 (later 132) hardened steel discs with the upper case alphabet, the numbers 0 9 and a few special symbols …
122bushing — /boosh ing/, n. 1. Elect. a lining for a hole, intended to insulate and protect from abrasion one or more conductors that pass through it. 2. Mach. a. a replaceable thin tube or sleeve, usually of bronze, mounted in a case or housing as a bearing …
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.… …
125international relations — a branch of political science dealing with the relations between nations. [1970 75] * * * Study of the relations of states with each other and with international organizations and certain subnational entities (e.g., bureaucracies and political… …
126building construction — Techniques and industry involved in the assembly and erection of structures. Early humans built primarily for shelter, using simple methods. Building materials came from the land, and fabrication was dictated by the limits of the materials and… …
127United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …
128Diving watch — Omega Seamaster model 2220.80, with a water resistance of 300 m (1,000 ft). The second crown (at 10 o clock) is a helium release valve. A diving watch is a watch designed for underwater diving that features, as a minimum, a water… …
