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
Priority claimed from FR696924537Aexternal-prioritypatent/FR2054501B1/fr
Application filedfiledCritical
Application grantedgrantedCritical
Publication of SU385442A3publicationCriticalpatent/SU385442A3/ru