Sphygmomanometer, bulbs, scale and armband inside a metal case

Sphygmomanometer, bulbs, scale and armband inside a metal case

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Sphygmomanometer, bulbs, scale and armband inside a metal case
Science Museum Group
© The Board of Trustees of the Science Museum

Sphygmomanometer, bulbs, scale and armband inside a metal case, English, 1930-1950