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Aqua-Lung

The first open scuba equipment. Developed by Emile Gagnan and Jacques Cousteau.

Aqualung is the title of an album by rock band Jethro Tull, who had not at the time realised the word was a trademark.

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Sanskrit language

... zero, guna[?], and vrdhii[?] grades. If V is the vowel of the zero grade, the guna grade vowel is traditionally thought of a V + a, and the vrdhii grade vowel as V ...