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Application filed by П.Л. Новожилов, И.М. ФингаузfiledCriticalП.Л. Новожилов
Priority to SU188293ApriorityCriticalpatent/SU49211A1/ru
Application grantedgrantedCritical
Publication of SU49211A1publicationCriticalpatent/SU49211A1/ru