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Application filed by Н.В. Витевский, В.И. Жунко, Л.С. ЗаглотинfiledCriticalН.В. Витевский
Priority to SU105363ApriorityCriticalpatent/SU31923A1/en
Application grantedgrantedCritical
Publication of SU31923A1publicationCriticalpatent/SU31923A1/en