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Hoist (mining) — A drum hoist (cables visible) and motor In underground mining a hoist or winder[1] is used to raise and lower conveyances within the mine shaft. Modern hoists are normally powered using electric motors, historically with … Wikipedia
commercial fishing — Introduction the taking of fish and other seafood and resources from oceans, rivers, and lakes for the purpose of marketing them. Fishing is one of the oldest employments of humankind. Ancient heaps of discarded mollusk shells (shell… … Universalium
Hoist (device) — This article is about Hoist (device). For other uses, see Hoist (disambiguation). A hoist is a device used for lifting or lowering a load by means of a drum or lift wheel around which rope or chain wraps. It may be manually operated, electrically … Wikipedia
Saudi Arabia — a kingdom in N and central Arabia, including Hejaz, Nejd, and dependencies. 20,087,965; ab. 600,000 sq. mi. (1,554,000 sq. km). Cap.: Riyadh. Cf. Mecca. * * * Saudi Arabia Introduction Saudi Arabia Background: In 1902 Abd al Aziz Ibn SAUD… … Universalium

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