pressure barrier

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• Pressure Piling — is a term used in electrical engineering in hazardous areas. It refers to a situation where, say, two classified electrical enclosures are connected together by a conduit. An explosion of a gas in one of the compartments travels through the… …   Wikipedia

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• Separation barrier — A separation barrier is a wall or fence constructed to limit the movement of people across a certain line or border, or to separate two populations. These structures vary in placement with regard to international borders and topography. The most… …   Wikipedia

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• Environmental threats to the Great Barrier Reef — The Great Barrier Reef is the world s largest coral reef system,cite web|author=UNEP World Conservation Monitoring Centre |year=1980|title=Protected Areas and World Heritage Great Barrier Reef World Heritage Area|url=http://sea.unep… …   Wikipedia

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• Noise barrier — The sound tube in Melbourne, Australia, designed to reduce roadway noise without detracting from the area s aesthetics. A noise barrier (also called a soundwall, sound berm, sound barrier, or acoustical barrier) is an exterior structure designed… …   Wikipedia