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Application filed by Е.Д. Колесов, Ф.А. Сахарова-МатвееваfiledCriticalЕ.Д. Колесов
Priority to SU159608ApriorityCriticalpatent/SU43734A1/ru
Application grantedgrantedCritical
Publication of SU43734A1publicationCriticalpatent/SU43734A1/ru