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Udokan Ridge in Chita Region
USSR. Chita Region. Employees of the Udokan geological exploration party near the Mi-4 helicopter of Aeroflot Airlines on the Udokan Ridge. The Udokan geological exploration expedition of the Chita Geological Administration was engaged in detailed additional exploration of the Udokan copper deposit and determining the optimal option for mining and ore processing technology. Grigory Kalachyan/TASS