 |
| spring -loaded valve: 27 phrases in 16 subjects |
| Armored vehicles | 1 |
| Automobiles | 2 |
| Caspian | 1 |
| Construction | 1 |
| Electronics | 1 |
| General | 5 |
| Mathematics | 1 |
| Mining | 1 |
| Occupational health & safety | 1 |
| Oil and gas | 2 |
| Oil and gas technology | 1 |
| Refrigeration | 2 |
| Shipbuilding | 1 |
| Technology | 5 |
| Tengiz | 1 |
| Transport | 1 |