The development of electric power industry and power lines in the (USSR) was associated with the. Subsequently the connection of the lines of the republics including the was organized into the "United Energy System" (UES) of the USSR. On 25 July 1962, within the framework of the (Comecon), the Soviet Union,,, ,. The development of electric power industry and power lines in the (USSR) was associated with the. Subsequently the connection of the lines of the republics including the was organized into the "United Energy System" (UES) of the USSR. On 25 July 1962, within the framework of the (Comecon), the Soviet Union,,,, the, and signed.