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 to SU1799898ApriorityCriticalpatent/SU416796A1/ru
Application grantedgrantedCritical
Publication of SU416796A1publicationCriticalpatent/SU416796A1/ru
УСТРОЙСТВО ДЛЯ ОЧИСТКИ ВНУТРЕННЕЙ ПОВЕРХНОСТИ ТРУБОПРОВОДОВФШЩf'. ••fi=":^'"rsT^P•• .s if, " -^ ^ г- 'i М ^'&il.fasii-j «у**