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Filing date
Publication date
Application filed by Е. Уланов М., И. Коновалов В.filedCriticalЕ. Уланов М.
Priority to SU1862678ApriorityCriticalpatent/SU435429A2/ru
Application grantedgrantedCritical
Publication of SU435429A1publicationCriticalpatent/SU435429A1/ru
Publication of SU435429A2publicationCriticalpatent/SU435429A2/ru