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Application filed by Ernst Rauch, Erhard Meyer, Erhard Kirsch, Johannes GlaenzelfiledCriticalErnst Rauch
Priority to DD20630578ApriorityCriticalpatent/DD137209A1/de
Priority to SU797770611Aprioritypatent/SU982949A1/ru
Priority to CS403579Aprioritypatent/CS218895B1/cs
Publication of DD137209A1publicationCriticalpatent/DD137209A1/de