The film is dedicated to the Bulgarian electricity sector. Showing building, turbine hall, dispatching complex hydrostations Belmeken-Sestrimo-Klisura; building machine rooms, control panels thermal power CHP-1 and CHP-Komsomolskaya Maritsa East-2, built by Soviet projects; Kozloduy nuclear power plant construction; power lines.
Soviet specialists talk about collaborations with Bulgarian colleagues (synchronously).
The film tells about the assistance that the Soviet Union has Bulgaria, supplying Donetsk coal and electricity in the electric bridge over Romania.
Key words
Energy.
Economic ties.