|
sources of radiation : 32 phrases in 14 subjects |
| Astronautics | 1 |
| Construction | 2 |
| Ecology | 2 |
| Energy industry | 7 |
| General | 1 |
| Makarov | 6 |
| Medical | 4 |
| Military | 1 |
| Nuclear and fusion power | 1 |
| Oil / petroleum | 1 |
| Oilfields | 2 |
| Politics | 1 |
| Radioengineering | 1 |
| Technology | 2 |