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| activité de la source (излучения) | |||
| Russian thesaurus | |||
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| число распадов радиоактивных ядер в единицу времени. Единицы активности - беккерель 1 Бк = 1 распад/с и кюри 1 Ки = 3,7.10-10 Бк. Большой Энциклопедический словарь | |||
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