History of electronics, vacuum triode

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Size: 4272px × 2848px
Location: Belarus
Photo credit: © Kisialiou Yury / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: analog, artifice, blackboard, blank, chart, circuit, close-, closeup, concept, copy, copyspace, design, device, diagram, drawing, education, electron, electronics, engineering, green, history, idea, instrument, invention, knowledge, layout, learning, lecture, notion, pattern, principle, projection, radio, schematic, scheme, school, show, space, teaching, transistor, triode, tube, vacuum, valve