 |
| valve piston: 95 phrases in 21 subjects |
| Armored vehicles | 5 |
| Automated equipment | 6 |
| Automobiles | 4 |
| Aviation | 1 |
| Construction | 2 |
| Drilling | 4 |
| General | 3 |
| Informal | 1 |
| Mechanic engineering | 11 |
| Mechanics | 2 |
| Military | 1 |
| Nuclear and fusion power | 1 |
| Oil / petroleum | 8 |
| Oil and gas | 2 |
| Oil and gas technology | 3 |
| Rail transport | 1 |
| Sakhalin | 2 |
| Shipbuilding | 2 |
| Technology | 20 |
| Thermal engineering | 8 |
| Transport | 8 |