Category:Vacuum tubes in art
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Media in category "Vacuum tubes in art"
The following 5 files are in this category, out of 5 total.
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Logo Mikroelektronik "Wilhelm Pieck" Mühlhausen.svg 283 × 283; 3 KB
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Progress in Electronics 15c 1973 issue U.S. stamp.jpg 1,303 × 842; 372 KB