double-reduction motor
121technology, history of — Introduction the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… …
122Diesel engine — Diesel engines in a museum Diesel generator on an oil tanker …
123Hypnosis — For the states induced by hypnotic drugs, see Sleep and Unconsciousness. Hypnotized redirects here. For other uses, see Hypnotized (disambiguation). Hypnosis Applications Hypnotherapy Stage hypnosis Self hypnosis Origins Animal magnetism Franz… …
124Steam engine — A steam engine is a heat engine that performs mechanical work using steam as its working fluid. [ [http://www.britannica.com/EBchecked/topic/564472/steam engine steam engine Britannica Online Encyclopedia ] ] Steam engines have a long history,… …
125Submarine — For other uses, see Submarine (disambiguation). A Japan Maritime Self Defense Force Oyashio class submarine in 2006 A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which… …
126Botulinum toxin — Clinical data Pregnancy cat.  ? Legal status  ? (US) Rout …
127Road traffic safety — Sidewalks, curbs and traffic signals in Maryland, United States …
128performing arts — arts or skills that require public performance, as acting, singing, or dancing. [1945 50] * * * ▪ 2009 Introduction Music Classical. The last vestiges of the Cold War seemed to thaw for a moment on Feb. 26, 2008, when the unfamiliar strains …
