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Application filed by Zdenek Chvojka, Walter Brosch, Jaroslav Pekar, Kvetoslav Ing Hlavka, Siegfried TomaschfiledCriticalZdenek Chvojka
Priority to CS836877ApriorityCriticalpatent/CS232694B1/en
Publication of CS687783A1publicationCriticalpatent/CS687783A1/en
Publication of CS232694B1publicationCriticalpatent/CS232694B1/en