vacuum-steam heating
51Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
52energy conversion — ▪ technology Introduction the transformation of energy from forms provided by nature to forms that can be used by humans. Over the centuries a wide array of devices and systems has been developed for this purpose. Some of these energy …
53Timeline of historic inventions — The timeline of historic inventions is a chronological list of particularly important or significant technological inventions. Note: Dates for inventions are often controversial. Inventions are often invented by several inventors around the same… …
54Coffeemaker — Coffeepot redirects here. For the populated place in Gila County, Arizona, United States, see Coffeepot, Arizona. Coffeemakers at the Wikimedia Foundation office Coffeemakers or coffee machines are cooking appliances used to brew coffee without… …
55materials science — the study of the characteristics and uses of various materials, as glass, plastics, and metals. [1960 65] * * * Study of the properties of solid materials and how those properties are determined by the material s composition and structure, both… …
56frozen prepared food — Introduction any of the complete meals or portions of meals that are precooked, assembled into a package, and frozen for retail sale. They are popular among consumers because they provide a diverse menu and are convenient to prepare. A… …
57Kiln — Kilns are thermally insulated chambers, or ovens, in which controlled temperature regimes are produced. They are used to harden, burn or dry materials. Specific uses include: *To dry green lumber so that the lumber can be used immediately *Drying …
58canning — /kan ing/, n. the act, process, or business of preserving cooked food by sealing in cans or jars. [1870 75, Amer.; CAN2 + ING1] * * * Method of preserving food from spoilage by storing it in containers that are hermetically sealed and then… …
59Canning — /kan ing/, n. 1. Charles John, 1st Earl, 1812 62, British statesman: governor general of India 1856 62. 2. his father, George, 1770 1827, British statesman: prime minister 1827. 3. Sir Stratford. See Stratford de Redcliffe, 1st Viscount. * * *… …
60Glossary of rail terminology — Rail transport Operations Track Maintenance High speed Gauge Stations …
