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| parent isotope | |||
| parent | |||
| original isotope; parent nuclide | |||
| precursor; radioactive precursor; nuclear parent; parent (any preceding nuclide in a decay chain) | |||
| исходный изотоп: 5 phrases in 4 subjects |
| Energy industry | 1 |
| Nuclear physics | 2 |
| Technology | 1 |
| Радиоактивное излучение | 1 |