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Hügelkultur (German pronunciation: [ˈhyːɡl̩kʊlˌtuːɐ̯], alternative spelling without umlaut: Huegelkultur), literally mound bed or mound culture, is a horticultural technique where a mound constructed from decaying wood debris and other compostable biomass plant materials is later (or immediately) planted as a raised bed.
Wooden ties are used on many traditional railways. In the background is a track with concrete ties. A railroad tie, crosstie (American English), railway tie (Canadian English) or railway sleeper (Australian and British English) is a rectangular support for the rails in railroad tracks.
The dominant features are the narrow gauge and lightness of the locomotives, relative to permanent railways. In Western Australia, to allow for interchangeability of rail stock with the government rail system, a lot of the lines were 3 ft 6 in (1,067 mm) gauge, however the weight of the rails was usually much less than mainline steel.
The rail profile is the cross sectional shape of a railway rail, perpendicular to its length. Early rails were made of wood, cast iron or wrought iron. All modern rails are hot rolled steel with a cross section approximate to an I-beam, but asymmetric about a horizontal axis (however see grooved rail below). The head is profiled to resist wear ...
A railway track (CwthE and UIC terminology) or railroad track (NAmE), also known as permanent way (CwthE) [1] or "P Way" (BrE [2] and Indian English), is the structure on a railway or railroad consisting of the rails, fasteners, sleepers (railroad ties in American English) and ballast (or slab track), plus the underlying subgrade.
Apart from structural wood preservation measures, there are a number of different chemical preservatives and processes (also known as timber treatment, lumber treatment or pressure treatment) that can extend the life of wood, timber, and their associated products, including engineered wood. These generally increase the durability and resistance ...
Panels are made slightly smaller than the available space within the frame to provide room for movement. Wood will expand and contract across the grain, and a wide panel made of solid wood could change width by a half of an inch, warping the door frame. By allowing the wood panel to float, it can expand and contract without damaging the door.
A Chongqing Rail Transit monorail train. Line 3 is the world's longest and busiest monorail line.. A monorail is a railway system in which the track consists of a single elevated rail, beam or track with the trains either supported or suspended.
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