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Application filed by Horst Bielig, Klaus Ball, Hans Dietrich PingelfiledCriticalHorst Bielig
Priority to DD19399376ApriorityCriticalpatent/DD126487B1/de
Publication of DD126487A1publicationCriticalpatent/DD126487A1/xx
Publication of DD126487B1publicationCriticalpatent/DD126487B1/de