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Application filed by Zak Bohumil, Stanek Jan, Votava Vladimir, Palecek Jaroslav, Kubelka Vladislav, Jiri Akademik OsteckyfiledCriticalZak Bohumil
Priority to CS861896ApriorityCriticalpatent/CS252920B1/cs
Publication of CS189686A1publicationCriticalpatent/CS189686A1/cs
Publication of CS252920B1publicationCriticalpatent/CS252920B1/cs