 |
| valve vent: 133 phrases in 37 subjects |
| Aerohydrodynamics | 1 |
| Apollo-Soyuz | 2 |
| Astronautics | 21 |
| Automated equipment | 1 |
| Automobiles | 2 |
| Aviation | 2 |
| Caspian | 1 |
| Combustion gas turbines | 3 |
| Construction | 4 |
| Electrical engineering | 1 |
| Electronics | 5 |
| Energy industry | 4 |
| Energy system | 1 |
| Forestry | 1 |
| Gas processing plants | 1 |
| General | 1 |
| Hydraulic engineering | 1 |
| Makarov | 1 |
| Mechanic engineering | 1 |
| Mechanics | 1 |
| Medical | 1 |
| Military | 7 |
| Nautical | 7 |
| Nuclear and fusion power | 4 |
| Oil / petroleum | 5 |
| Oil and gas | 9 |
| Oil and gas technology | 3 |
| Oilfields | 1 |
| Plumbing | 2 |
| Scuba diving | 1 |
| Shipbuilding | 1 |
| Solar power | 1 |
| Submarines | 1 |
| Technology | 29 |
| Thermal engineering | 2 |
| Torpedoes | 1 |
| Transport | 3 |