| http://www.w3.org/ns/prov#value | - This combination of gases and vapors is referred to collectively as the head-space gas 14. [0043] The gas supply system 20 connected to the chamber 10 supplies the oxygen-carrying breathing gas to the breathable liquid 12 and can act both to oxygenate and also to purge other expired gases, such as carbon dioxide from the breathable liquid 12.
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