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Application filed by Е.Я. Винецкая, Е.Я. ВинецкаfiledCriticalЕ.Я. Винецкая
Priority to SU22888ApriorityCriticalpatent/SU20737A1/en
Application grantedgrantedCritical
Publication of SU20737A1publicationCriticalpatent/SU20737A1/en