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Actions	Details Remove from selection Add to selection Title GEC: Osram Valve Guide and Book of circuits Reference UK0108 NAEST 045/405 Date 1939 Physical description Number of pieces: 1, Pages/folios: 68 pp Language English Persons keyword GEC Subject Valves, Circuits Level of description file Hierarchy browser 110000001 NATIONAL ARCHIVE FOR ELECTRICAL SCIENCE AND TECHNOLOGY contains 322 parts UK0108 NAEST 045 Printed Papers contains 558 parts UK0108 NAEST 045/405 GEC: Osram Valve Guide and Book of circuits

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