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Application filed by Г.А. Вайнтраубе, М.А. КаганfiledCriticalГ.А. Вайнтраубе
Priority to SU109785ApriorityCriticalpatent/SU30332A1/ru
Application grantedgrantedCritical
Publication of SU30332A1publicationCriticalpatent/SU30332A1/ru