oxygen diluter

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Oxygen mask — A plastic oxygen mask on an ER patient. An oxygen mask provides a method to transfer breathing oxygen gas from a storage tank to the lungs. Oxygen masks may cover the nose and mouth (oral nasal mask) or the entire face (full face mask). They may… … Wikipedia
diluter-demand oxygen system — An aircraft oxygen system that delivers mixed, or diluted with air, oxygen to maintain a constant partial pressure of oxygen as the altitude changes. The system allows 100% oxygen to be supplied in an emergency. See also demand oxygen system … Aviation dictionary

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