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PCE
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CPC Subgroup
F28C 3/08

with change of state, e.g. absorption, evaporation, condensation (generating steam under pressure F22)

Full Title

Other direct-contact heat-exchange apparatus > the heat-exchange media being a liquid and a gas or vapour (temperators for cooling steam F22) > with change of state, e.g. absorption, evaporation, condensation (generating steam under pressure F22)