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Publication of SU376944A1publicationCriticalpatent/SU376944A1/ru
Priority claimed from SU1469618Aexternal-prioritypatent/SU399131A1/ru
Priority claimed from DE19702032686external-prioritypatent/DE2032686A1/de
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Publication of SU376944A3publicationCriticalpatent/SU376944A3/ru