| |||
| 重影信号 | |||
|
double-image : 41 phrases in 10 subjects |
| Air defense | 1 |
| Communications | 1 |
| Information technology | 1 |
| Medicine - Alternative medicine | 2 |
| Metallurgy | 4 |
| Oil / petroleum | 2 |
| Physics | 1 |
| Polygraphy | 1 |
| Technology | 27 |
| Telecommunications | 1 |
| |||
| 重影信号 | |||
|
double-image : 41 phrases in 10 subjects |
| Air defense | 1 |
| Communications | 1 |
| Information technology | 1 |
| Medicine - Alternative medicine | 2 |
| Metallurgy | 4 |
| Oil / petroleum | 2 |
| Physics | 1 |
| Polygraphy | 1 |
| Technology | 27 |
| Telecommunications | 1 |