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Publication date
Application filed by Е.И. Меркулова, А.Я. ЯкубовичfiledCriticalЕ.И. Меркулова
Priority to SU40931ApriorityCriticalpatent/SU63647A1/ru
Application grantedgrantedCritical
Publication of SU63647A1publicationCriticalpatent/SU63647A1/ru