each end of the crack is drilled so that the crack

  • 1Construction of the Trans-Alaska Pipeline System — The construction of the Trans Alaska Pipeline System was a massive undertaking involving tens of thousands of people often in extreme temperatures and conditions. Specialized construction techniques were pioneered to build the pipeline, most of… …

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  • 2Battle of the Bulge — For other uses, see Battle of the Bulge (disambiguation). Battle of the Bulge Part of World War II …

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  • 3History of the petroleum industry in Canada (oil sands and heavy oil) — Canada s oil sands and heavy oil resources are among the world s great petroleum deposits. They include the vast oil sands of northern Alberta, and the heavy oil reservoirs that surround the small city of Lloydminster, which sits on the border… …

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  • 4explosive — explosively, adv. explosiveness, n. /ik sploh siv/, adj. 1. tending or serving to explode: an explosive temper; Nitroglycerin is an explosive substance. 2. pertaining to or of the nature of an explosion: explosive violence. 3. likely to lead to… …

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  • 5Glossary of cue sports terms — The following is a glossary of traditional English language terms used in the three overarching cue sports disciplines: carom (or carambole) billiards referring to the various carom games played on a billiard table without pockets; pool (pocket… …

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  • 6Clock Tower, Palace of Westminster — The Clock Tower is the world s largest four faced, chiming clock. The structure is situated at the north eastern end of the Houses of Parliament in Westminster, London. It is often colloquially referred to as Big Ben, which is actually the… …

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  • 7HMS Lutine (1779) — The Lutine was a Magicienne class frigate of the French Navy, launched in 1779, captured by the Royal Navy, recommissioned as HMS Lutine , and lost in 1799. The Lutine Bell from the ship is preserved at Lloyd s of London. Lutine was originally a… …

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  • 8Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry       The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …

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  • 9mining — /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… …

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  • 10tunnels 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 …

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