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Application filed by Н.Н. Ворожцов, С.Ф. МиценгендлерfiledCriticalН.Н. Ворожцов
Priority to SU171301ApriorityCriticalpatent/SU47691A1/ru
Application grantedgrantedCritical
Publication of SU47691A1publicationCriticalpatent/SU47691A1/ru