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radium C'
радиоакт. radium C' (RaC', 214Po, RaC', 214Po)
radium C
радиоакт. radium C (RaC, 214Bi, RaC, 214Bi)
radium C"
радиоакт. radium C" (RaC", 21⁰T1, RaC", 210T1)