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Application filed by Heinrich ZoellyfiledCriticalHeinrich Zoelly
Publication of CH75632ApublicationCriticalpatent/CH75632A/de
Verfahren zur Erzielung gleichmäßiger Umlaufsgeschwindigkeit in Warmwasserheizungsanlagen, in welchen der Umlauf des Wassers vermittelst Dampf beschleunigt wird