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Publication of SU382286A1publicationCriticalpatent/SU382286A1/ru
Priority claimed from SU1638555Aexternal-prioritypatent/SU399127A1/ru
Priority claimed from DE19702016290external-prioritypatent/DE2016290A1/de
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Publication of SU382286A3publicationCriticalpatent/SU382286A3/ru