 |
| valve seal: 64 phrases in 18 subjects |
| Astronautics | 2 |
| Automobiles | 3 |
| Aviation | 1 |
| Electrical engineering | 2 |
| Electronics | 2 |
| Engines | 1 |
| Machine components | 4 |
| Metallurgy | 6 |
| Military | 2 |
| Molikpaq | 1 |
| Oil and gas | 1 |
| Oilfields | 1 |
| Production | 2 |
| Solar power | 1 |
| Technology | 21 |
| Thermal engineering | 1 |
| Transport | 12 |
| Valves | 1 |