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Title: [Go to resource]
Description: "Endurance" gas cylinder regulator, patented, by British Oxygen Co., English, 1920-1940 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: stopcocks Temporal: 1920-1940 Source: Science Museum Creator: British Oxygen Company Limited Identifier: A662739 Go to resource More Like this...
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