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62133 Results for
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Some info about FRENCH
Emile Gagnan
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TECHNOLOGY
Émile Gagnan used for the first Scuba equipment.[1] The demand-valve, or regulator, was designed for regulating gas in gas-generator engines, but was found to be excellent for regulating air-supply under varied pressure conditions. This allowed people to explore the ocean more easily, even though the original purpose was different.[2] <
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