| |||
| 矩形波 | |||
| 方波 | |||
|
rectangular wave : 12 phrases in 7 subjects |
| Air defense | 3 |
| Chemistry | 1 |
| Construction | 1 |
| Electric machinery | 1 |
| Electronics | 2 |
| Geophysics | 1 |
| Technology | 3 |
| |||
| 矩形波 | |||
| 方波 | |||
|
rectangular wave : 12 phrases in 7 subjects |
| Air defense | 3 |
| Chemistry | 1 |
| Construction | 1 |
| Electric machinery | 1 |
| Electronics | 2 |
| Geophysics | 1 |
| Technology | 3 |