 |
| |||
| 信令电路 | |||
| signaling circuit: 12 phrases in 6 subjects |
| Air defense | 1 |
| Communications | 2 |
| Electronics | 1 |
| Information technology | 1 |
| Technology | 3 |
| Telecommunications | 4 |
|
| |||
| 信令电路 | |||
| signaling circuit: 12 phrases in 6 subjects |
| Air defense | 1 |
| Communications | 2 |
| Electronics | 1 |
| Information technology | 1 |
| Technology | 3 |
| Telecommunications | 4 |