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Application filed by Н.А. Голушко, Ф.Ф. ЭрнтсбергерfiledCriticalН.А. Голушко
Priority to SU130092ApriorityCriticalpatent/SU41423A1/en
Application grantedgrantedCritical
Publication of SU41423A1publicationCriticalpatent/SU41423A1/en