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Application filed by Виктор Петрович Карпов, Людвиг Генрихович Боярский, Лев Константинович ЭрнстfiledCriticalВиктор Петрович Карпов
Priority to SU904850962ApriorityCriticalpatent/RU1790333C/ru
Application grantedgrantedCritical
Publication of RU1790333CpublicationCriticalpatent/RU1790333C/ru