安全装置: 102 phrases in 13 subjects |
Airports and air traffic control | 1 |
Armored vehicles | 1 |
Astronautics | 1 |
Construction | 2 |
Drilling | 1 |
Electrical engineering | 1 |
Electronics | 24 |
General | 43 |
Military | 3 |
Nuclear and fusion power | 1 |
Oil and gas | 1 |
Oilfields | 1 |
Technology | 22 |