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UNITED STATES 1950s: Pistons on conveyor belt. Machine moving, zoom out to worker. Man at machine. Hands press button . Machine parts moving.
CIRCA 1937 - WPA workers translate books and maps into braille and visually impaired patients are bussed to a clinic for eye examinations.
1960s: Hand with pencil underlines and adds numbers to top of contract.
UNITED STATES 1970s: Engine Room Telegraph
1930s: Typewriter. Fingers press on "JKL;" keys. Intertitle "Each finger strikes a specific range of keys". Stick points to typewriter's keyboard poster. Left hand types on typewriter's left side.
1940s: Teacher adds detail to colored slide with pencil. Teacher unrolls black gummed tape on desk.
UNITED STATES: 1950s: side profile of man's face. Man paints at table. Hand paints lines on paper

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1041212821

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Stock Video ID: 1041212821

1960s: CHINA: girl calculates using abacus. Figuring on abacus to work out bill

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