case-ring gauge
31Spain — /spayn/, n. a kingdom in SW Europe. Including the Balearic and Canary islands, 39,244,195; 194,988 sq. mi. (505,019 sq. km). Cap.: Madrid. Spanish, España. * * * Spain Introduction Spain Background: Spain s powerful world empire of the 16th and… …
32AC power plugs and sockets — See also: Industrial and multiphase power plugs and sockets Plugs and sockets may sometimes combine male and female contacts, but t …
33Gewehr 98 — with bayonet and 5 round stripper clip on the side Type Bolt action rifle Place of origin …
34Matrix (mathematics) — Specific elements of a matrix are often denoted by a variable with two subscripts. For instance, a2,1 represents the element at the second row and first column of a matrix A. In mathematics, a matrix (plural matrices, or less commonly matrixes)… …
35Mathematics 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… …
36Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
37Photon — This article is about the elementary particle of light. For other uses, see Photon (disambiguation). Photon Photons emitted in a coherent beam from a laser Composition Elementary particle …
38High Speed 1 — approaching the Medway Viaducts …
39Austria — Austrian, adj., n. /aw stree euh/, n. a republic in central Europe. 8,054,078; 32,381 sq. mi. (83,865 sq. km). Cap.: Vienna. German, Österreich. * * * Austria Introduction Austria Background: Once the center of power for the large Austro… …
40Glossary of rail terminology — Rail transport Operations Track Maintenance High speed Gauge Stations …
