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Publication of SU407114A1publicationCriticalpatent/SU407114A1/ru
Priority claimed from SU1757990Aexternal-prioritypatent/SU407114A1/ru
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Priority to SU1757990ApriorityCriticalpatent/SU407114A1/ru
Application grantedgrantedCritical
Publication of SU407114A2publicationCriticalpatent/SU407114A2/ru