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underground extraction

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  • Underground era of Christian metal — refers to the 1990s era of Christian metal movement when it was no longer in the spotlight of the mainstream media, and the many bands focused on the underground metal styles, the major ones being thrash metal, death metal, unblack metal, power… …   Wikipedia

  • Extraction of petroleum — Pumpjack on an oil well in Texas The extraction of petroleum is the process by which usable petroleum is extracted and removed from the earth. Contents 1 …   Wikipedia

  • Underground mining (hard rock) — A three dimensional model of an underground mine with shaft access Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, mainly those containing metals[1] such as ore containing gold …   Wikipedia

  • Shale oil extraction — Shell s experimental in situ shale oil facility, Piceance Basin, Colorado, United States Process type Chemical Industrial sector(s) Chemical industry, oil indus …   Wikipedia

  • Oil shale extraction — is an industrial process in which kerogen mdash;a mixture of organic chemical compounds (including hydrocarbons) found in oil shale mdash;is converted into synthetic crude oil through pyrolysis. In pyrolysis, oil shale is heated in the absence of …   Wikipedia

  • Menstrual extraction — Background Abortion type Surgical First use 1971 Gestation First trimester Usage Developed and often used in lay setting …   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

  • Soil vapor extraction — (SVE) is an in situ process for soil remediation where contamination is removed from soil by carrying it out through a medium such as air or steam. The extracted soil vapors are separated into liquids and vapors, and each stream is treated as… …   Wikipedia

  • Block (extraction of petroleum) — A block in the context of extraction of petroleum, (and natural gas) signifies a sub division of an underground reservoir for the purpose of administering a certain production allowable. [ [http://www.eub.gov.ab.ca/bbs/requirements/actsregs/ogc… …   Wikipedia

  • mine spoil, coal extraction —    Randomly mixed, earthy materials artificially deposited as a result of either surficial or underground coal mining activities; a type of mine spoil.    SW …   Glossary of landform and geologic terms

  • mine spoil, metal-ore extraction —    Randomly mixed, earthy materials artificially deposited as a result of either surficial or underground metal ore mining activities; a type of mine spoil.    SW …   Glossary of landform and geologic terms

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