| |||
| 底反射; 底面反射 | |||
| 海底反射 | |||
| ★ 海底声反射 | |||
|
bottom reflection : 7 phrases in 4 subjects |
| Geophysics | 1 |
| Oil / petroleum | 2 |
| Space | 1 |
| Technology | 3 |
| |||
| 底反射; 底面反射 | |||
| 海底反射 | |||
| ★ 海底声反射 | |||
|
bottom reflection : 7 phrases in 4 subjects |
| Geophysics | 1 |
| Oil / petroleum | 2 |
| Space | 1 |
| Technology | 3 |