 |
| |||
| 双臂信号 | |||
|
double signal : 12 phrases in 8 subjects |
| Air defense | 3 |
| Chemistry | 1 |
| Communications | 1 |
| Electronics | 1 |
| Rail transport | 1 |
| Space | 1 |
| Technology | 3 |
| Television | 1 |
|
| |||
| 双臂信号 | |||
|
double signal : 12 phrases in 8 subjects |
| Air defense | 3 |
| Chemistry | 1 |
| Communications | 1 |
| Electronics | 1 |
| Rail transport | 1 |
| Space | 1 |
| Technology | 3 |
| Television | 1 |