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 |