dust-free drilling
41Graphite — For other uses, see Graphite (disambiguation). Graphite Graphite specimen General Category Native element mineral …
42Oman — Sultanate of Oman سلطنة عُمان Salṭanat ʻUmān …
43Indoor air quality — (IAQ) is a term referring to the air quality within and around buildings and structures, especially as it relates to the health and comfort of building occupants. IAQ can be affected by microbial contaminants (mold, bacteria), gases (including… …
44Sago Mine disaster — wikinewshas|three articles on the accident * * *The Sago Mine disaster was a coal mine explosion on January 2, 2006, in the Sago Mine (pronEng|ˈseɪgoʊ) in Sago, West Virginia, USA near the Upshur County seat of Buckhannon. The blast and ensuing… …
45cement — cementable, adj. cementer, n. cementless, adj. /si ment /, n. 1. any of various calcined mixtures of clay and limestone, usually mixed with water and sand, gravel, etc., to form concrete, that are used as a building material. 2. any of various… …
46steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying …
47Ukraine — /yooh krayn , kruyn , yooh krayn/, n. a republic in SE Europe: rich agricultural and industrial region. 50,684,635; 223,090 sq. mi. (603,700 sq. km). Cap.: Kiev. Russian, Ukraina. Formerly, Ukrainian Soviet Socialist Republic. * * * Ukraine… …
48colonialism, Western — ▪ politics Introduction a political economic phenomenon whereby various European nations explored, conquered, settled, and exploited large areas of the world. The age of modern colonialism began about 1500, following the European… …
49Geyser — For other uses, see Geyser (disambiguation). Strokkur geyser, Iceland …
50Xanthan gum — is a polysaccharide used as a food additive and rheology modifier Harv|Davidson ch. 24. It is produced by a process involving fermentation of glucose or sucrose by the Xanthomonas campestris bacterium. Chemical structureThe backbone of the… …
