 |
| vent system: 59 phrases in 17 subjects |
| Astronautics | 8 |
| Aviation | 4 |
| Chemistry | 1 |
| Construction | 5 |
| Dental implantology | 1 |
| Ecology | 1 |
| Electronics | 3 |
| Energy industry | 8 |
| Makarov | 1 |
| Medical | 1 |
| Molikpaq | 7 |
| Nuclear and fusion power | 1 |
| Oil and gas | 9 |
| Sakhalin | 1 |
| Sakhalin S | 2 |
| Technology | 4 |
| Thermal engineering | 2 |