layer of grit

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• Grit bin — A grit bin or salt bin is an item of street furniture, commonly found in countries where freezing temperatures and snowfall occur , which holds a mixture of salt and grit which is spread over roads if they have snow or ice on them. A grit bin… …   Wikipedia

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• abrasive — abrasively, adv. abrasiveness, n. /euh bray siv, ziv/, n. 1. any material or substance used for grinding, polishing, etc., as emery, pumice, or sandpaper. adj. 2. tending to abrade; causing abrasion; abrading. 3. tending to annoy or cause ill… …   Universalium

• Sewage treatment — The objective of sewage treatment is to produce a disposable effluent without causing harm to the surrounding environment, and also prevent pollution.[1] Sewage treatment, or domestic wastewater treatment, is the process of removing contaminants… …   Wikipedia

• Geology of Yorkshire — In Yorkshire there is a very close relationship between the major topographical areas and the geological period in which they were formed. The Pennine chain of Hills in the west is of Carboniferous origin. The central vale is Permo Triassic. The… …   Wikipedia

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• Winter service vehicle — A winter service vehicle (WSV), or snow removal vehicle, is used to clear thoroughfares of ice and snow.cite news|url=http://news.bbc.co.uk/1/hi/magazine/6342887.stm|title=How do snowplough drivers get to work?|publisher=BBC News Magazine… …   Wikipedia

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• Saprolite — A represents soil; B represents laterite, a regolith; C represents saprolite, a less weathered regolith; beneath C is bedrock Saprolite is a chemically weathered rock. Saprolites form in the lower zones of soil profiles and represent deep… …   Wikipedia

• Sandpaper — Abrasive Paper is a form of paper where an abrasive material has been fixed to its surface.Abrasive Paper is part of the Coated abrasives family of abrasive products. It is used to remove small amounts of material from surfaces, either to make… …   Wikipedia