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Publication date
Application filed by И.М. Поляков, ков И.М. ПолfiledCriticalИ.М. Поляков
Priority to SU373453ApriorityCriticalpatent/SU75454A1/ru
Application grantedgrantedCritical
Publication of SU75454A1publicationCriticalpatent/SU75454A1/ru