 |
| concrete structure: 48 phrases in 16 subjects |
| Automated equipment | 1 |
| Building materials | 1 |
| Building structures | 3 |
| Construction | 20 |
| Drilling | 2 |
| Electronics | 2 |
| Facilities | 2 |
| Makarov | 1 |
| Military | 1 |
| Nautical | 1 |
| Oil / petroleum | 4 |
| Oil and gas | 4 |
| Oil and gas technology | 2 |
| Oilfields | 2 |
| Technology | 1 |
| Weapons of mass destruction | 1 |