1950s: Toothbrushes move back and forth in testing machinery of factory lab. Scientist removes teeth from test tube and tests them in acid solution.

Name: 1950s Toothbrushes Move Back Forth Testing
Uploaded: 2021-12-05T00:00:00.000Z
Duration: 33 s
Channel: AV Geeks
Description: 1950s: Toothbrushes move back and forth in testing machinery of factory lab. Scientist removes teeth from test tube and tests them in acid solution. Stock Footage Video (100% Royalty-free) 1083401308 | Shutterstock

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AV Geeks

1950s: Toothbrushes move back and forth in testing machinery of factory lab. Scientist removes teeth from test tube and tests them in acid solution.

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