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Publication of SU398777A1publicationCriticalpatent/SU398777A1/ru
Priority claimed from SU1623855Aexternal-prioritypatent/SU398777A1/ru
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Priority to SU1623855ApriorityCriticalpatent/SU398777A1/ru
Application grantedgrantedCritical
Publication of SU398777A2publicationCriticalpatent/SU398777A2/ru