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Publication of SU399686A1publicationCriticalpatent/SU399686A1/ru
Priority claimed from SU1772764Aexternal-prioritypatent/SU399686A1/ru
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Priority to SU1772764ApriorityCriticalpatent/SU399686A1/ru
Application grantedgrantedCritical
Publication of SU399686A2publicationCriticalpatent/SU399686A2/ru
