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CIRCA 1940s - An animation shows electrical impulses traveling from a camera plate to a receiver scren and a research scientist harnesses electrons in a vacuum tube in 1945.
R
By Rick Ray
- Stock footage ID: 31400179
HD | $79 | 1920 × 1080 | MOV | 666.7 MB |
SD | $65 | 852 × 480 | MOV | 51.8 MB |
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