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June 29, 2011
Cosmonaut Sergei K. Krikalev, Expedition One flight engineer representing the Russian Aviation and Space Agency, carries the Vozdukh in the Unity node. Vozdukh is designed to maintain the partial pressure of carbon dioxide in the cabin air within the medically permissible range for long-duration exposure. It provides the primary means of removing CO2 from the outpost's atmosphere, and its operation is based on the use of regenerated adsorbers of CO2.

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