| http://www.w3.org/ns/prov#value | - UK Patent No 1 224 478, describes an anesthetic vaporizer of the by-pass type in which a carrier gas such as oxygen, air or nitrous oxide is initially divided on entry to the vaporizer between a first stream which is directed towards the sump or vaporizing chamber of the vaporizer to entrain vapor from a volatile liquid anesthetic contained therein; and a second by-pass stream, the first and secon
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