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Actions	Details Remove from selection Add to selection Title Round SG valve Reference NAEST 186/40 Date n.d. Scope and Content Photograph Physical description Number of pieces: 1 Language English. Persons keyword Round H J Captain Subject Valves Level of description file Hierarchy browser 110000001 NATIONAL ARCHIVE FOR ELECTRICAL SCIENCE AND TECHNOLOGY contains 323 parts UK0108 NAEST 186 Dalton collection of radio slides contains 53 parts NAEST 186/40 Round SG valve

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