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Application filed by Ю.А. Баскаков, Н.Н. МельниковfiledCriticalЮ.А. Баскаков
Priority to SU396672ApriorityCriticalpatent/SU77919A1/en
Application grantedgrantedCritical
Publication of SU77919A1publicationCriticalpatent/SU77919A1/en