通信中心: 208 phrases in 16 subjects |
Air defense | 26 |
Automobiles | 1 |
Aviation | 24 |
Business | 3 |
Earth sciences | 7 |
Electronics | 74 |
General | 7 |
Geophysics | 1 |
Medical | 1 |
Mining | 1 |
Project management | 2 |
Shipbuilding | 1 |
Space | 30 |
Technology | 16 |
Telecommunications | 7 |
United States | 7 |