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pivoted rail

См. также в других словарях:

  • Pedrail — Ped rail , n. [See {Pedi }; {Rail}.] (Mach.) (a) A device intended to replace the wheel of a self propelled vehicle for use on rough roads and to approximate to the smoothness in running of a wheel on a metal track. The tread consists of a number …   The Collaborative International Dictionary of English

  • keyboard instrument — ▪ music Introduction       any musical instrument on which different notes can be sounded by pressing a series of keys, push buttons, or parallel levers. In nearly all cases in Western music the keys correspond to consecutive notes in the… …   Universalium

  • World War I — the war fought mainly in Europe and the Middle East, between the Central Powers and the Allies, beginning on July 28, 1914, and ending on November 11, 1918, with the collapse of the Central Powers. Abbr.: WWI Also called Great War, War of the… …   Universalium

  • Crane (machine) — A modern crawler type derrick crane with outriggers. The latticed boom is fitted with a jib. A crane is a type of machine, generally equipped with a hoist, wire ropes or chains, and sheaves, that can be used both to lift and lower material …   Wikipedia

  • Nottingham Corporation Tramways — This article is about trams between 1898–1938. For trams between 1875 1897, see Nottingham and District Tramways Company Limited. For trams from 2004 onwards, see Nottingham Express Transit. Tram passing Nottingham Victoria Railway Station… …   Wikipedia

  • Railway semaphore signal — One of the earliest forms of fixed railway signal is the semaphore. These signals display their different indications to train drivers by changing the angle of inclination of a pivoted arm . Semaphore signals were patented in the early 1840s by… …   Wikipedia

  • Grinds (skateboarding) — Grinds are a form of skateboarding trick where the skateboarder slides on the side or on the trucks. Grinds are performed on any object that may fit between the space between the wheels where the truck meets. There s about 30 45 skate truck… …   Wikipedia

  • Fly system — Fly loft of the Theater Bielefeld in Germany A fly system, flying system or theatrical rigging system, is a system of lines (e.g. ropes), blocks (pulleys), counterweights and related devices within a theatre that enable a stage crew to quickly,… …   Wikipedia

  • Steam locomotive — A steam locomotive is a locomotive powered by steam. The term usually refers to its use on railways, but can also refer to a road locomotive such as a traction engine or steamroller.Steam locomotives dominated rail traction from the mid 19th… …   Wikipedia

  • Railway signalling — Not to be confused with Railway signal. A gantry of British semaphore signals seen from the cab of a steam locomotive Railway signalling is a system used to control railway traffic safely, essentially to prevent trains from colliding. Being… …   Wikipedia

  • Timeline of railway history — This is a timeline of rail transport history.Seealso| Timeline of steam power.* ca. 600 BCVerdelis, Nikolaos: Le diolkos de L Isthme , Bulletin de Correspondance Hellénique , Vol. 81 (1957), pp. 526 529 (526)] Cook, R. M.: Archaic Greek Trade:… …   Wikipedia

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