 |
| |||
| 信号代码〔符号〕; 信号电码 | |||
| 通讯密码 | |||
| 信号代码 | |||
| 信号代码; 信号符号; 信号电码; 码组; 通信密码 | |||
| signal code: 27 phrases in 11 subjects |
| Air defense | 2 |
| Aviation | 1 |
| Communications | 1 |
| Earth sciences | 1 |
| Electronics | 1 |
| General | 2 |
| Information technology | 2 |
| Space | 2 |
| Sports | 1 |
| Technology | 11 |
| Telecommunications | 3 |