Electrical Vacuum Tube, 1922

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Size: 3900px × 2468px
Location:
Photo credit: © Science History Images / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: -ray, ., bw, chilblains, cure, device, electrical, electricity, female, history, male, man, medical, medicine, person, ross, treatment, tube, vacuum, wart, woman