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Abstract
A self-refrigerated suit using dry ice as cooling agent and allowing the wearer to move about freely is described. Its efficiency during exposure to heat (dry bulb temperature, ta = 46 C; wet bulb temperature, twb = 35 C) and heavy physical work on a treadmill has been demonstrated by experiments on 26 subjects. The heart rate is reduced and the body temperature is decreased. The way in which this self-refrigerated suit reduces the heat load is discussed and the usefulness of its application is emphasized.
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