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Priority to SU1879248ApriorityCriticalpatent/SU433643A1/ru
Priority claimed from SU1879248Aexternal-prioritypatent/SU433643A1/ru
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Publication of SU433643A2publicationCriticalpatent/SU433643A2/ru
Publication of SU433643A1publicationCriticalpatent/SU433643A1/ru