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Publication of CH273512ApublicationCriticalpatent/CH273512A/en
G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
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CH273512D1939-06-241947-11-04
Automatic regulating device for main electrical machines.
CH273512A
(en)