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Experimental installation of the Physics and Technology Institute of the Academy of Sciences of the Turkmen SSR
USSR. Turkmen SSR. Ashgabat. Postgraduate student N. Korpeyev during the testing of a thermoelectric generator of an experimental installation that converts solar energy into electrical energy, in the solar engineering laboratory of the Physics and Technology Institute of the Academy of Sciences of the Turkmen SSR. Valentin Kunov/TASS