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English definition of “oxygen tank”

oxygen tank

noun [C]    
a container with oxygen inside it, used for helping people to breathe , for example when they are very ill , or when they are diving underwater Containers for liquids and gasesMedical dressings, supports and devicesWater sportsSwimmingSailing and boating
(Definition of oxygen tank noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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