 |
| |||
| seismogram | |||
| 地震曲 线: 21 phrases in 6 subjects |
| Bridge construction | 2 |
| General | 1 |
| Geophysics | 5 |
| Hydroelectric power stations | 2 |
| Oil / petroleum | 5 |
| Technology | 6 |
|
| |||
| seismogram | |||
| 地震曲 线: 21 phrases in 6 subjects |
| Bridge construction | 2 |
| General | 1 |
| Geophysics | 5 |
| Hydroelectric power stations | 2 |
| Oil / petroleum | 5 |
| Technology | 6 |