 |
| disk valve: 54 phrases in 16 subjects |
| Armored vehicles | 1 |
| Automated equipment | 1 |
| Automobiles | 4 |
| Construction | 7 |
| Electrical engineering | 1 |
| General | 1 |
| Makarov | 5 |
| Mechanic engineering | 5 |
| Military | 1 |
| Oil / petroleum | 3 |
| Oil and gas technology | 3 |
| Oilfields | 1 |
| Sakhalin | 2 |
| Technology | 16 |
| Thermal engineering | 2 |
| Transport | 1 |