closed electric-reduction furnace
51Hafnium — lutetium ← hafnium → tantalum Zr ↑ Hf ↓ Rf …
52Glamorgan — For other uses, see Glamorgan (disambiguation). Glamorgan Welsh: Morgannwg Motto: A Ddioddefws A Orfu (He Who suffered, conquered)[1][2] …
53Fictitious force — Classical mechanics Newton s Second Law History of classical mechanics  …
54China — This article is about the People s Republic of China. For the state commonly known as Taiwan, see the Republic of China. For other uses, see China (disambiguation). PRC redirects here. For other uses, see PRC (disambiguation). People …
55insurance — /in shoor euhns, sherr /, n. 1. the act, system, or business of insuring property, life, one s person, etc., against loss or harm arising in specified contingencies, as fire, accident, death, disablement, or the like, in consideration of a… …
56Electronic engineering — is a discipline dealing with the behavior and effects of electrons (as in electron tubes and transistors) and with electronic devices, systems, or equipment.The term now also covers a large part of electrical engineering degree courses as studied …
57Radiometric dating — (often called radioactive dating) is a technique used to date materials such as rocks, usually based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates.[1]… …
58American Iron and Steel Institute — The American Iron and Steel Institute (AISI) is an association of North American steel producers. With its predecessor organizations, is one of the oldest trade associations in the United States, dating back to 1855. It assumed its present form… …
59Phoenix (spacecraft) — This article is about the Mars lander. For the Star Trek spacecraft, see Phoenix (Star Trek). For other uses, see Phoenix (disambiguation). Phoenix Mars Mission Artist s impression of the Phoenix spacecraft as it lands on Mars Operator NASA …
60Recuperator — A recuperator is a special purpose counter flow heat exchanger used to recover waste heat from exhaust gases. In many types of processes, combustion is used to generate heat, and the recuperator serves to recuperate, or reclaim this heat, in… …
