PD12M

Close up of a glass tube with a yellow ruler next to it on a white…

The image shows a close up of a glass tube with a yellow ruler next to it on a white surface.

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The image shows a close up of a glass tube with a yellow ruler next to it on a white surface. The tube appears to be a tetrode, a type of vacuum tube, and the ruler is likely used to measure the size of the tube.

Credit: The image shows a close up of a glass tube with a yellow ruler next to it on a white surface. The tube appears to be a tetrode, a type of vacuum tube, and the ruler is likely used to measure the size of the tube. · Wikimedia Commons · https://huggingface.co/datasets/Spawning/PD12M · https://creativecommons.org/publicdomain/zero/1.0/
License: https://creativecommons.org/publicdomain/zero/1.0/

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