 |
| |||
| signal instruction | |||
| 信号指令: 27 phrases in 9 subjects |
| Air defense | 1 |
| Automobiles | 1 |
| Aviation | 7 |
| Electric machinery | 1 |
| Electronics | 1 |
| Space | 11 |
| Technology | 2 |
| Telecommunications | 2 |
| Transport | 1 |
|
| |||
| signal instruction | |||
| 信号指令: 27 phrases in 9 subjects |
| Air defense | 1 |
| Automobiles | 1 |
| Aviation | 7 |
| Electric machinery | 1 |
| Electronics | 1 |
| Space | 11 |
| Technology | 2 |
| Telecommunications | 2 |
| Transport | 1 |