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back-scatter : 74 phrases in 15 subjects |
| Chemistry | 1 |
| Construction | 2 |
| Electrochemistry | 1 |
| Electronics | 1 |
| Geophysics | 2 |
| Makarov | 5 |
| Mass media | 10 |
| Metallurgy | 1 |
| Nuclear physics | 6 |
| Physics | 1 |
| Radiation | 25 |
| Radioengineering | 2 |
| Radiography | 13 |
| Road works | 1 |
| Technology | 3 |