 |
| variable valves: 44 phrases in 15 subjects |
| Antennas and waveguides | 1 |
| Astronautics | 1 |
| Automated equipment | 3 |
| Automobiles | 10 |
| Aviation | 5 |
| Construction | 1 |
| Electrical engineering | 2 |
| Makarov | 3 |
| Mass media | 1 |
| Mechanics | 2 |
| Nautical | 3 |
| Production | 2 |
| Programming | 1 |
| Technology | 8 |
| Transport | 1 |