Aqua-lung

Aqua-Lung was the original English name of the first open-circuit, self-contained underwater breathing apparatus (or `SCUBA`) to reach worldwide popularity and commercial success. This class of equipment is now commonly referred to as a diving regulator or demand valve. The Aqua-Lung was invented in Paris during the winter of 1942–1943 by two .....
Found on http://en.wikipedia.org/wiki/Aqua-lung
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