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Publication of SU408778A1publicationCriticalpatent/SU408778A1/ru
Priority claimed from SU1783723Aexternal-prioritypatent/SU408778A1/ru
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Priority to SU1783723ApriorityCriticalpatent/SU408778A1/ru
Application grantedgrantedCritical
Publication of SU408778A2publicationCriticalpatent/SU408778A2/ru