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F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
F28D17/00—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles
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FR535961D1921-05-241921-05-24Perfectionnements aux récupérateurs de chaleur et réchauffeurs d'air et de gaz
ExpiredFR535961A
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Perfectionnements apportés aux échangeurs de chaleur du type à plaques, notamment ` ceux de ce type pour le réchauffage de l'air par des gaz de combustion