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Application filed by Kurt Schiller, Gennadij B Strejs, Franz V Mueller, Alexandr M Gofman, Heinz O Bekker, Nikolaj N Trubinov, Egon Fanhhenel, Vladimir M SmyslovfiledCriticalKurt Schiller
Publication of CS143583A1publicationCriticalpatent/CS143583A1/en
Publication of CS251924B1publicationCriticalpatent/CS251924B1/en