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Publication of SU351379A1publicationCriticalpatent/SU351379A1/ru
Priority claimed from AT831568Aexternal-prioritypatent/AT326803B/de
Application filedfiledCritical
Priority to SU1385366ApriorityCriticalpatent/SU374848A3/ru
Application grantedgrantedCritical
Publication of SU413651A3publicationCriticalpatent/SU413651A3/ru