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Application filed by Л.Н. Айзенберг, Р.С. Айзенберг, А.К. КрамерfiledCriticalЛ.Н. Айзенберг
Priority to SU380653ApriorityCriticalpatent/SU76793A1/ru
Application grantedgrantedCritical
Publication of SU76793A1publicationCriticalpatent/SU76793A1/ru