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Publication of SU407666A1publicationCriticalpatent/SU407666A1/ru
Priority claimed from SU1755573Aexternal-prioritypatent/SU407666A1/ru
Application filedfiledCritical
Priority to SU1755573ApriorityCriticalpatent/SU407666A1/ru
Application grantedgrantedCritical
Publication of SU407666A2publicationCriticalpatent/SU407666A2/ru