 |
| |||
| primary reflection | |||
| 一次反射: 11 phrases in 6 subjects |
| Air defense | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 1 |
| Geophysics | 2 |
| Oil / petroleum | 3 |
| Technology | 2 |
|
| |||
| primary reflection | |||
| 一次反射: 11 phrases in 6 subjects |
| Air defense | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 1 |
| Geophysics | 2 |
| Oil / petroleum | 3 |
| Technology | 2 |