dust extraction plant
41Egypt — /ee jipt/, n. 1. Arab Republic of. a republic in NE Africa. 64,791,891; 386,198 sq. mi. (1,000,252 sq. km). Cap.: Cairo. Arabic, Misr. Formerly (1958 71), United Arab Republic. 2. an ancient kingdom in NE Africa: divided into the Nile Delta… …
42Perfluorooctanoic acid — IUPAC name pentadecafluorooctanoic acid …
43Diesel fuel — Diesel oil redirects here. Sometimes diesel oil is used to mean lubricating oil for diesel engines. Diesel fuel (  / …
44Coal — Sedimentary Rock Anthracite coal Composition Primary carbon Secondary hydrogen, sulfur …
45Mining in the Upper Harz — The headframe of the Emperor William Shaft in Clausthal is one of the oldest surviving winding towers in Germany …
46Cocaine — For other uses, see Cocaine (disambiguation). Cocaine …
47Dolaucothi Gold Mines — The Dolaucothi Gold Mines (grid reference SN662403), also known as the Ogofau Gold Mine, are Roman surface and deep mines located in the valley of the River Cothi, near Pumsaint, Carmarthenshire, Wales. The gold mines are located within the… …
48tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening …
49Silicon dioxide — Silica redirects here. For other uses, see Silica (disambiguation). Silicon dioxide …
50Asbestos — For other uses, see Asbestos (disambiguation). Fibrous asbestos on muscovite …
