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Priority to IT711379UpriorityCriticalpatent/IT7907113V0/en
Publication of IT7907113V0publicationCriticalpatent/IT7907113V0/en
IT711379U1979-12-201979-12-20
ECONOMIZING DEVICE TO RECOVER THE HEAT OF THE SMOKES EXITING FROM AN APPLIANCE SUITABLE FOR HEATING ROOMS.
IT7907113V0
(en)