| http://www.w3.org/ns/prov#value | - Nowhere in the art is a method or apparatus for maintaining worker comfort in a hot environment described using a cooling cap, an umbilical having a single liquid conduit, and a cooling source including a passively pressurized cooling liquid connected to the cooling cap by the umbilical; whereby heat transfer between the workers head and the cooling cap is enhanced by means of a heat transfer gel
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