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Application filed by Vsevolod V Abramov, Vsevolod V Kuznecov, Alexandr V Veselov, Vitalij S Tchaj, Nikolaj I RysinfiledCriticalVsevolod V Abramov
Priority to CS817559ApriorityCriticalpatent/CS249757B1/en
Publication of CS755981A1publicationCriticalpatent/CS755981A1/en
Publication of CS249757B1publicationCriticalpatent/CS249757B1/en