 |
|
time plot : 38 phrases in 15 subjects |
| Astronautics | 1 | Geophysics | 2 | Non-destructive testing | 1 |
| Astronomy | 1 | Intelligence and security services | 1 | Oilfields | 2 |
| Automated equipment | 3 | Makarov | 2 | Sakhalin | 1 |
| Aviation | 2 | Mathematics | 1 | Seismology | 9 |
| Economics | 2 | Metallurgy | 4 | Technology | 6 |