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 |