Moscow Metro named after. V.I. Lenin

March 1980. USSR. Moscow. Laboratory assistant of the microclimate laboratory of the All-Russian Research Institute of Railway Hygiene N. V. Makarova, senior researcher A. V. Sinkov and engineer I. K. Rizhova (from left to right) during a chemical analysis of the air at the Sviblovo station of the Kaluzhsko-Rizhskaya line of the Moscow metro named after V. I. Lenin. The exact date of the photo is unknown. Viktor Budan/TASS