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Application filed by Ю.Д. Соколов-ВишневскийfiledCriticalЮ.Д. Соколов-Вишневский
Priority to SU178118ApriorityCriticalpatent/SU51585A1/en
Application grantedgrantedCritical
Publication of SU51585A1publicationCriticalpatent/SU51585A1/en