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Application filed by Л.Б. Зиссерсон, И.И. КитайгородскийfiledCriticalЛ.Б. Зиссерсон
Priority to SU160391ApriorityCriticalpatent/SU44318A1/ru
Application grantedgrantedCritical
Publication of SU44318A1publicationCriticalpatent/SU44318A1/ru