two-way cylinder
21Four-way cock — The four way cock is a fluid control valve of considerable antiquity. The valve body has four ports equally spaced round the valve chamber and the plug has two passages to connect adjacent ports. Its was used to control the flow of steam to the… …
22printing — /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.… …
23automobile — automobilist /aw teuh meuh bee list, moh bi list/, n. /aw teuh meuh beel , aw teuh meuh beel , aw teuh moh beel, beuhl/, n. 1. a passenger vehicle designed for operation on ordinary roads and typically having four wheels and a gasoline or diesel… …
24Elevator — For other uses, see Elevator (disambiguation). A set of lifts in the lower level of a London Underground station. The arrows indicate each elevator s position and direction of travel …
25Diesel engine — Diesel engines in a museum Diesel generator on an oil tanker …
26Dan Graham — Born March 31, 1942 (1942 03 31) (age 69) Urbana, Illinois Nationality …
27Time travel — This article details time travel itself. For other uses, see Time Traveler. Time travel is the concept of moving between different moments in time in a manner analogous to moving between different points in space, either sending objects (or in… …
28Poppet valve — A poppet valve is a valve consisting of a hole, usually round or oval, and a tapered plug, usually a disk shape on the end of a shaft also called a valve stem. The shaft guides the plug portion by sliding through a valve guide. In most… …
29Railway air brake — Piping diagram from 1920 of a Westinghouse E T Air Brake system on a locomotive …
30AMC Ambassador — Infobox Automobile manufacturer=American Motors Corporation assembly=Kenosha, Wisconsin layout=FR layout production=1958 1974 class=Mid size name=AMC AmbassadorThe Ambassador was the top line automobile produced by the American Motors Corporation …
