Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filedfiledCritical
Priority claimed from SU1380086Aexternal-prioritypatent/SU390715A3/ru
Application grantedgrantedCritical
Publication of SU379088A3publicationCriticalpatent/SU379088A3/ru