 |
| spool valve: 159 phrases in 17 subjects |
| Armored vehicles | 2 |
| Astronautics | 1 |
| Automated equipment | 7 |
| Automobiles | 2 |
| Aviation | 1 |
| Construction | 1 |
| Electrical engineering | 3 |
| Energy industry | 1 |
| General | 1 |
| Hydraulics | 1 |
| Mechanics | 3 |
| Oil and gas | 1 |
| Oil and gas technology | 1 |
| Rail transport | 1 |
| Technology | 123 |
| Transport | 9 |
| Wood processing | 1 |