 |
| pressure/vacuum valve: 25 phrases in 14 subjects |
| Armored vehicles | 1 |
| Automatic control | 1 |
| Automobiles | 1 |
| Electrical engineering | 1 |
| Energy industry | 2 |
| General | 1 |
| Machinery and mechanisms | 1 |
| Makarov | 2 |
| Oil / petroleum | 2 |
| Oil and gas technology | 1 |
| Sakhalin | 5 |
| Shipbuilding | 1 |
| Technology | 3 |
| Tengiz | 3 |