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Application filed by В.Ф. Габеркорн, Д.Р. ШифманfiledCriticalВ.Ф. Габеркорн
Priority to SU132367ApriorityCriticalpatent/SU39735A1/ru
Application grantedgrantedCritical
Publication of SU39735A1publicationCriticalpatent/SU39735A1/ru