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Application filed by Vladimir Ovsjannikov, Lubomir PuflerfiledCriticalVladimir Ovsjannikov
Priority to CS600275ApriorityCriticalpatent/CS180287B1/cs
Priority to SU762378052Aprioritypatent/SU826100A1/ru
Publication of CS180287B1publicationCriticalpatent/CS180287B1/cs