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Application filed by Л.П. Калениченко, Е.С. Мамолат, О.Ф. ПлющfiledCriticalЛ.П. Калениченко
Priority to SU383783ApriorityCriticalpatent/SU76740A1/en
Application grantedgrantedCritical
Publication of SU76740A1publicationCriticalpatent/SU76740A1/en