 |
| valve: 139 phrases in 15 subjects |
| Agriculture | 2 |
| Astronautics | 1 |
| Chemistry | 1 |
| Commerce | 1 |
| Earth sciences | 2 |
| Electronics | 28 |
| Energy industry | 1 |
| Forestry | 1 |
| Industry | 5 |
| Materials science | 15 |
| Mechanic engineering | 19 |
| Metallurgy | 2 |
| Patents | 3 |
| Power electronics | 18 |
| Transport | 40 |