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the decrease in the radiation intensity of a radioactive material with respect to time, mis tahes radioaktiivse aine kiirgustugevuse kahanemine aja jooksul
radioaktiivsuse kahanemine . Militerm | riigikaitseterminite andmebaas . Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mil/radioaktiivsuse%20kahanemine/1/est (21.06.2026)