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Application filed by Т.М. Дульман, А.А. Имшенецкий, А.А. КопьевfiledCriticalТ.М. Дульман
Priority to SU2630ApriorityCriticalpatent/SU73699A1/en
Application grantedgrantedCritical
Publication of SU73699A1publicationCriticalpatent/SU73699A1/en