MAKE A MEME View Large Image Teltron-Electron-Beam-Tube.jpg Teltron Electron Beam Tube digital image of apparatus 2006-11-01 Thaddeus P Bejnar Public Domain Physics instruments and technology Vacuum tubes
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Keywords: Teltron-Electron-Beam-Tube.jpg Teltron Electron Beam Tube digital image of apparatus 2006-11-01 Thaddeus P Bejnar Public Domain Physics instruments and technology Vacuum tubes
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