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1950s: Person slides mixture of sulfur and copper into test-tube, then holds over flame until it turns black and smokes.
A cartoon man showcases the largest light bulb in the world to a small girl in the 1940s. (1940s)
1950s: Man pours liquid in burette. Man looks at measurement on burette, makes note on paper.
CIRCA 1958 - Men and women work with copper to make electronics boards and coils at a nuclear facility.
1960s: Hands move bar magnets near magnet on turnstile to create spinning motion.
UNITED STATES 1950s: Close up, hand opens valve, holds match over gas / Liquid bubbling in tubes.
Equipment For Teeth Whitening In Dental Clinic

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1099996319

Stock Video ID: 1099996319

1940s: Dentist cleans girl's teeth while boy and dental hygienist watch. Dental hygienist shows dental tools to boy. hygienist places tool on tray.

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