british standard wire gauge
21Screw — This article is about the fastener. For other uses, see Screw (disambiguation). Screws come in a variety of shapes and sizes for different purposes. U.S. quarter coin (diameter 24 mm) shown for scale. A screw, or bolt, is a type of fastener… …
22Poland — /poh leuhnd/, n. a republic in E central Europe, on the Baltic Sea. 38,700,291; ab. 121,000 sq. mi. (313,400 sq. km). Cap.: Warsaw. Polish, Polska. * * * Poland Introduction Poland Background: Poland is an ancient nation that was conceived around …
23IEC 60228 — is the International Electrotechnical Commission s international standard on conductors of insulated cables .Among other things, it defines a set of standard wire cross sections:In engineering applications, it is often most convenient to describe …
24Body piercing — For other uses, see Piercing (disambiguation). Nipple piercings, vertical labret piercing and stretched ears Body piercing, a form of body modification, is the practice of puncturing or cutting a part of the human body, creating an opening in… …
25Science and invention in Birmingham — Birmingham is the second largest city in the United Kingdom. It is one of the country s principal industrial centres and has an impressive history of industrial and scientific innovation.16th century1547: Although no record is kept to indicate… …
26Metrication in Canada — The metrication logo used in Canada during the 1970s and 1980s. Canada has converted to the metric system for many purposes but there is still significant use of non metric units and standards in many sectors of the Canadian economy. This is… …
27Список стандартов штепсельных разъёмов — В мире наиболее распространены два основных стандарта напряжения и частоты. Один из них  американский стандарт 110 127 Вольт 60 Герц, совместно с вилками A и B. Другой стандарт  европейский, 220 240 Вольт 50 Герц, вилки типов C  M …
28Pressure vessel — Vertical pressure vessels installed in a structure A pressure vessel is a closed container designed to hold gases or liquids at a pressure substantially different from the ambient pressure. The pressure differential is dangerous and many fatal… …
29Drill and tap size chart — Below is a comprehensive drill and tap size chart for all drills, imperial and metric, and taps up to 36.5 mm. Contents 1 Chart 2 See also 3 References 4 External links …
30Power cable — This article is about electric power conductors. For portable equipment, see power cord. A power cable is an assembly of two or more electrical conductors, usually held together with an overall sheath. The assembly is used for transmission of… …
