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Application filed by Afanasij S Ivancikov, Boris L Golovinskij, Tamara A IvancikovafiledCriticalAfanasij S Ivancikov
Priority to CS849396ApriorityCriticalpatent/CS271068B1/en
Publication of CS939684A1publicationCriticalpatent/CS939684A1/en
Publication of CS271068B1publicationCriticalpatent/CS271068B1/en