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Application filed by И.А. Айзенштат, М.Б. СкибинскийfiledCriticalИ.А. Айзенштат
Priority to SU902-46ApriorityCriticalpatent/SU71390A1/ru
Application grantedgrantedCritical
Publication of SU71390A1publicationCriticalpatent/SU71390A1/ru