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layer of broken stones

См. также в других словарях:

  • ballast — bal|last [ˈbæləst] n [U] [Date: 1500 1600; Origin: Probably from Low German] 1.) heavy material that is carried by a ship to make it more steady in the water 2.) material such as sand that is carried in a ↑balloon so that it can be thrown out to… …   Dictionary of contemporary English

  • roads and highways — ▪ transportation Introduction       traveled way on which people, animals, or wheeled vehicles move. In modern usage the term road describes a rural, lesser traveled way, while the word street denotes an urban roadway. Highway refers to a major… …   Universalium

  • History of road transport — The history of road transport started with the development of tracks by humans and their beasts of burden. Early roads The first forms of road transport were horses, oxen or even humans carrying goods over tracks that often followed game trails,… …   Wikipedia

  • Tumulus — For other uses, see Tumulus (disambiguation). The Royal mounds of Gamla Uppsala in Sweden from the 5th and the 6th centuries. Originally, the site had 2000 to 3000 tumuli, but owing to quarrying and agriculture only 250 remain …   Wikipedia

  • Macadam — is a type of road construction pioneered by the Scotsman John Loudon McAdam in around 1820. The method simplified what had been considered state of the art at that point.Before McAdamBefore McAdam, French road director Pierre Marie Jérôme… …   Wikipedia

  • architecture — /ahr ki tek cheuhr/, n. 1. the profession of designing buildings, open areas, communities, and other artificial constructions and environments, usually with some regard to aesthetic effect. Architecture often includes design or selection of… …   Universalium

  • mining — /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… …   Universalium

  • Roman bridge — For a list of all known Roman bridges, see List of Roman bridges : For the railway station in Wales, see Roman Bridge railway station Roman bridges, built by ancient Romans, were the first large and lasting bridges built.Roman bridges were built… …   Wikipedia

  • Glossary of environmental science — This is a glossary of environmental science.Environmental science is the study of interactions among physical, chemical, and biological components of the environment. Environmental science provides an integrated, quantitative, and… …   Wikipedia

  • Appian Way — The Appian Way (Latin and Italian: Via Appia) was the most important ancient Roman road. It is also called the the queen road . [cite news |first= |last= |authorlink= |coauthors= |title=Past Catches Up With the Queen of Roads… …   Wikipedia

  • dam — dam1 /dam/, n., v., dammed, damming. n. 1. a barrier to obstruct the flow of water, esp. one of earth, masonry, etc., built across a stream or river. 2. a body of water confined by a dam. 3. any barrier resembling a dam. v.t. 4. to furnish with a …   Universalium

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