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Application filed by Б.А. Архангельский, Я.М. ШульманfiledCriticalБ.А. Архангельский
Priority to SU137635ApriorityCriticalpatent/SU36932A1/en
Application grantedgrantedCritical
Publication of SU36932A1publicationCriticalpatent/SU36932A1/en