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Application filed by И.Ф. Китаев, П.Ф. ЛантшfiledCriticalИ.Ф. Китаев
Priority to SU89018ApriorityCriticalpatent/SU30433A1/ru
Application grantedgrantedCritical
Publication of SU30433A1publicationCriticalpatent/SU30433A1/ru