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Priority claimed from CH425670Aexternal-prioritypatent/CH531501A/de
Application filedfiledCritical
Priority to SU711700724ApriorityCriticalpatent/SU385440A3/ru
Priority to SU711707046Aprioritypatent/SU403173A3/ru
Priority to SU711700831Aprioritypatent/SU385439A3/ru
Application grantedgrantedCritical
Publication of SU385438A3publicationCriticalpatent/SU385438A3/ru