 |
|
surface element : 25 phrases in 15 subjects |
| Automobiles | 1 |
| Chemistry | 1 |
| Construction | 1 |
| Electronics | 1 |
| Energy industry | 1 |
| Firefighting and fire-control systems | 1 |
| Makarov | 4 |
| Mathematics | 1 |
| Military | 3 |
| Nanotechnology | 1 |
| Oil / petroleum | 1 |
| Physics | 1 |
| Refrigeration | 1 |
| Space | 3 |
| Technology | 4 |