Water — This article is about general aspects of water. For a detailed discussion of its properties, see Properties of water. For other uses, see Water (disambiguation) … Wikipedia
Sand casting — Sand casting, also known as sand molded casting, is a metal casting process characterized by using sand as the mold material. It is relatively cheap and sufficiently refractory even for steel foundry use. A suitable bonding agent (usually clay)… … Wikipedia
Abrasive blasting — Sandblasting a stone wall Diesel powered compressor used as an air supply for sandblasting … Wikipedia
Slippery rail — is an adverse condition of railroads caused by fallen moist leaves that lie on and cling to the top surface of the rails of railroad tracks. The condition can cause severe premature wear on railroad equipment, delay railroad traffic and force… … Wikipedia
tunnels 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 … Universalium
mining — /muy ning/, n. 1. the act, process, or industry of extracting ores, coal, etc., from mines. 2. the laying of explosive mines. [1250 1300; ME: undermining (walls in an attack); see MINE2, ING1] * * * I Excavation of materials from the Earth s… … Universalium
Garnet — For other uses, see Garnet (disambiguation). Garnet General Category Nesosilicate Chemical … Wikipedia
Dredging — Dredge redirects here. For other uses, see Dredge (disambiguation). Dredgers redirects here. For the German municipality, see Dreggers. Dredging is an excavation activity or operation usually carried out at least partly underwater, in shallow… … Wikipedia
Road — This article is about a route, thoroughfare or way that supports travel by a means of conveyance. For a place outside a harbor where a ship can lie at anchor, see Roadstead. For public roads, see Highway. For other routes, see thoroughfare. For… … Wikipedia
Explosive material — A number of 1.25lb M112 Demolition Charges, consisting of a C 4 compound, sit atop degraded weaponry scheduled for destruction An explosive material, also called an explosive, is a reactive substance that contains a great amount of potential… … Wikipedia
coal mining — Coal was very important in the economic development of Britain. It was used as fuel in the factories built during the Industrial Revolution and continued to be important until the 1980s. The main coalfields are in north east England, the north… … Universalium