-
1 полихлорированный бифенил
полихлорированный бифенил
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
polychlorinated biphenyl
PCBs are a family of chemical compounds which do not exist in nature but which are man-made. Commercial mixtures are clear, pale yellow liquids, manufactured by the replacement of hydrogen atoms on the biphenyl molecule by chlorine. Because of their physical properties, PCBs are commonly found in electrical equipment which requires dielectric fluid such as power transformers and capacitors, as well as in hydraulic machinery, vacuum pumps, compressors and heat-exchanger fluids. Other uses include: lubricants, fluorescent light ballasts, paints, glues, waxes, carbonless copy paper, inks including newspapers, dust-control agents for dirt roads, solvents for spreading insecticides, cutting oils. PCBs are stable compounds and although they are no longer manufactured they are extremely persistent and remain in huge quantities in the atmosphere and in landfill sites. They are not water-soluble and float on the surface of water where they are eaten by aquatic animals and so enter the food chain. PCBs are fat-soluble, and are therefore easy to take into the system, but difficult to excrete. (Source: PZ / PHC)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > полихлорированный бифенил
См. также в других словарях:
Electrical conduit — risers, seen inside fire resistance rated shaft, as seen entering bottom of a firestop. The firestop is made of firestop mortar on top, rockwool on the bottom. Raceways are used to protect cables from damage … Wikipedia
Electrical discharge wire cutting — Electrical discharge wire cutting. См. Электро разрядная проводная резка. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) … Словарь металлургических терминов
Electrical discharge machining — An electrical discharge machine Electric discharge machining (EDM), sometimes colloquially also referred to as spark machining, spark eroding, burning, die sinking or wire erosion,[1] is a manufacturing process whereby a desired shape is obtained … Wikipedia
Cutting fluid — Thin wall milling of aluminum using a water based cutting fluid on the milling cutter. Cutting fluid is a type of coolant and lubricant designed specifically for metalworking and machining processes. There are various kinds of cutting fluids,… … Wikipedia
Electrical steel — Surface of grain oriented electrical steel with removed coating, with visible grains of crystallites Electrical steel, also called lamination steel, silicon electrical steel, silicon steel or transformer steel, is specialty steel tailored to… … Wikipedia
Plasma cutting — This article is about the common manufacturing process. For various fictional weapons, see plasma rifle and directed energy weapon. Plasma cutting is a process that is used to cut steel and other metals (or sometimes other materials) using a… … Wikipedia
Laser cutting — process on a sheet of steel. CAD (top) and stainless steel laser cut part (bottom) Laser cutting is a technology that uses a laser to cut materials, an … Wikipedia
Fuse (electrical) — A miniature time delay fuse used to protect electronic equipment, rated 0.3 amperes at 250 volts. 1.25 inches (about 32 mm) long … Wikipedia
Grinding (abrasive cutting) — Sketch of how abrasive particles in a grinding wheel remove material from a workpiece. Grinding is an abrasive machining process that uses a grinding wheel as the cutting tool. A wide variety of machines are used for grinding: Hand cranked knife… … Wikipedia
National Electrical Manufacturers Association — NEMA redirects here. For other uses, see Nema (disambiguation). Not to be confused with NMEA, the National Maritime Electronics Association. NEMA is the association of electrical and medical imaging equipment manufacturers. Founded in 1926 and… … Wikipedia
Underwater welding — refers to a number of distinct welding processes that are performed underwater.cite book |author=Keats, DJ |year=2005 |title=Underwater Wet Welding A Welder s Mate |publisher=Speciality Welds Ltd |url=http://www.specialwelds.com |isbn=1 899293 99 … Wikipedia