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Publication date
Application filed by Е.Н. Воробьева, А.Ф. ДивийскийfiledCriticalЕ.Н. Воробьева
Priority to SU4605ApriorityCriticalpatent/SU64480A1/ru
Application grantedgrantedCritical
Publication of SU64480A1publicationCriticalpatent/SU64480A1/ru