F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
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Engineering & Computer Science
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Physics & Mathematics
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Thermal Sciences
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Mechanical Engineering
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General Engineering & Computer Science
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Developing Agents For Electrophotography
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Diaphragms For Electromechanical Transducers
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Financial Or Insurance-Related Operations Such As Payment And Settlement
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