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Title: Six thermionic valves [Go to resource]
Description: Six thermionic valves, comprising: Osram "Catkin" MS4B; Triotron H32; Triotron P440N; Western Electric 4002A; Western Electric 4101DL; Mullard PM22A License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Temporal: 1920-1940 Source: Science Museum Identifier: 1993-626 Go to resource More Like this...
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