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Application filed by Willy Bock, Gerhardt Dongowski, Horst Maischack, Imre Molnar, Ilse Mildner, Heinrich ArndtfiledCriticalWilly Bock
Priority to DD18833975ApriorityCriticalpatent/DD137783A3/en
Publication of DD137783A3publicationCriticalpatent/DD137783A3/en