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Application filed by Т.А. Бесяков, ков Т.А. БесfiledCriticalТ.А. Бесяков
Priority to SU171289ApriorityCriticalpatent/SU46784A1/en
Application grantedgrantedCritical
Publication of SU46784A1publicationCriticalpatent/SU46784A1/en