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Application filed by Frantisek Dolihal, Ando Jan, Drkal Jaroslav, Havranek Milan, Musil Ivan, Vaclav Sustr, Eduard SidlofiledCriticalFrantisek Dolihal
Priority to CS835512ApriorityCriticalpatent/CS236822B1/en
Publication of CS551283A1publicationCriticalpatent/CS551283A1/en
Publication of CS236822B1publicationCriticalpatent/CS236822B1/en