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Application filed by Frantisek Jaros, Josef Ing Skarka, Zdenek Kotrba, Vaclav Vobornik, Hortlik Frantisek, Jan JunekfiledCriticalFrantisek Jaros
Priority to CS836578ApriorityCriticalpatent/CS237627B1/en
Publication of CS657883A1publicationCriticalpatent/CS657883A1/en
Publication of CS237627B1publicationCriticalpatent/CS237627B1/en