| |||
defense communications system | |||
defense communication system; national defense communication system | |||
defence communications system | |||
| |||
defense communication system |
国防通信系统: 32 phrases in 7 subjects |
Air defense | 3 |
Aviation | 1 |
Earth sciences | 2 |
Electronics | 10 |
General | 1 |
Space | 11 |
United States | 4 |