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Application filed by Josef Vanca, Haumer Jaroslav, Klecan Vaclav, Hrdina Pavel, Bares Milan, Karel ProchazkafiledCriticalJosef Vanca
Priority to CS873719ApriorityCriticalpatent/CS260740B1/en
Publication of CS371987A1publicationCriticalpatent/CS371987A1/en
Publication of CS260740B1publicationCriticalpatent/CS260740B1/en