Période

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Pumping bot examined
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Pumping bot examined

The primary ambulance
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The primary ambulance

Leg saver. Chester Antos, student at Georgetown University medical school, photographed with the newly devised Emerson suction pressure apparatus which designers believe will prevent amputation in man...
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Leg saver. Chester Antos, student at Georgetown Un...

Suction Street Cleaning Machine Invention 1925
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Suction Street Cleaning Machine Invention 1925