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Application filed by М.М. Кацнельсон, М.С. ЭвентоваfiledCriticalМ.М. Кацнельсон
Priority to SU403-44ApriorityCriticalpatent/SU65565A1/ru
Application grantedgrantedCritical
Publication of SU65565A1publicationCriticalpatent/SU65565A1/ru