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Publication of SU199835A1publicationCriticalpatent/SU199835A1/en
Application filed by Н.Б. ЛапкинаfiledCriticalН.Б. Лапкина
Priority to SU111163ApriorityCriticalpatent/SU35835A1/en
Application grantedgrantedCritical
Publication of SU35835A1publicationCriticalpatent/SU35835A1/en