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Priority to SU1746682ApriorityCriticalpatent/SU426239A1/en
Priority claimed from SU1746682Aexternal-prioritypatent/SU426239A1/en
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Publication of SU426239A2publicationCriticalpatent/SU426239A2/en
Publication of SU426239A1publicationCriticalpatent/SU426239A1/en