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| uranium series; uranium radioactive series; 4n + 2 series; uranium-radium radioactive series; uranium radioactive family; radioactive family of uranium; 4n + 2 family; uranium-radium radioactive family; radioactive family of uranium-radium | |||
| семейство урана-радия: 10 phrases in 1 subject |
| Радиоактивное излучение | 10 |