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Application filed by Siegfried Kahl, Hartmut Dolgner, Menzel Karl Heinz, Jobst HegerfiledCriticalSiegfried Kahl
Priority to DD20299377ApriorityCriticalpatent/DD132957B1/en
Priority to CS636678Aprioritypatent/CS209217B1/en
Publication of DD132957A1publicationCriticalpatent/DD132957A1/en
Publication of DD132957B1publicationCriticalpatent/DD132957B1/en