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Application filed by В.Г. ШиршовfiledCriticalВ.Г. Ширшов
Priority to SU2676500/06ApriorityCriticalpatent/SU747207A2/ru
Application grantedgrantedCritical
Publication of RU747207CpublicationCriticalpatent/RU747207C/ru
Publication of SU747207A2publicationCriticalpatent/SU747207A2/ru