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Application filed by Е. Б. Алексеев, М. А. Анан В. Г. Шульга, И. В. ЗайцевскийfiledCriticalЕ. Б. Алексеев
Priority to SU1818781ApriorityCriticalpatent/SU432678A2/ru
Application grantedgrantedCritical
Publication of SU432678A1publicationCriticalpatent/SU432678A1/ru
Publication of SU432678A2publicationCriticalpatent/SU432678A2/ru