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Gorniczy Agregat Gasniczy : ウィキペディア英語版 | Gorniczy Agregat Gasniczy The Górniczy Agregat Gaśniczy (GAG) is a jet engine inertisation unit developed for use in mines, controlling and suppressing coal seam fires and neutralising firedamp situations. The unit was designed in Poland in the 1970s, its name roughly translates as "Mine Fire Suppression Apparatus". A GAG 3A unit was developed by the Queensland Mines Rescue Service, in association with the Commonwealth Scientific and Industrial Research Organisation (CSIRO). GAG units have been used in Australia since 1998.〔 ==Mechanism== The GAG unit emits carbon dioxide, nitrogen and water vapour.〔 The gases lower the oxygen levels, suppressing fires, and forcing methane out of the mine. A unit is capable of pumping a volume of 25 m3/s, creating levels of less than 1% oxygen.〔 When fully assembled, the unit is 12 metres long and weighs 2.5 tonnes. As of 2010, there were only three GAG units in the world – in Australia, the Netherlands and the Ukraine . The "GAG" unit from the Netherlands is called Steamexfire.
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