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Application filed by Pirko Jan, Novotny Otakar, Jaroslav ManlfiledCriticalPirko Jan
Priority to CS86529ApriorityCriticalpatent/CS256271B1/en
Priority to SU867774382Aprioritypatent/SU1513048A1/en
Publication of CS52986A1publicationCriticalpatent/CS52986A1/en
Publication of CS256271B1publicationCriticalpatent/CS256271B1/en