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Emile Gagnan Biography
Emile Gagnan (born November 1900) was a French engineer and co-inventor (together with Jacques Cousteau) of the demand-valve used for the first Scuba equipment ("Aqua-Lung") in 1943. The demand-valve was designed for regulating gas in gas-generator engines, but was found to be excellent for regulating air-supply under variating pressure conditions.
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article Emile Gagnan.