the vacuum tubes old tube are dusty working order internal structure technology 20th century |
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| navigate by keyword : aluminum analog background black cobweb device dirty electronic glass glows gray industrial industry internal lamp light machine macro mechanic metal museum object old password red spiral technology transparent vintage work |
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| The vacuum tubes in an old tube TV are dusty in working order. The internal structure of technology of the 20th century. The lamp is on and off. High quality photo. |
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