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Application filed by Ivan I Krival, Georgij A Mirskich, Leonid G CypkunfiledCriticalIvan I Krival
Priority to CS831315ApriorityCriticalpatent/CS246580B1/en
Publication of CS131583A1publicationCriticalpatent/CS131583A1/en
Publication of CS246580B1publicationCriticalpatent/CS246580B1/en