| 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 alternately an umbilical having a liquid conduit and a gas conduit, and a cooling source connectable to the cooling cap by the umbilical; whereby the cooling source may consist of a container of liquid under pressure and a c
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