 |
| |||
| 地面观测站 | |||
|
surface observation station : 3 phrases in 3 subjects |
| Explosives and Explosive Ordnance Disposal | 1 |
| Surveying | 1 |
| Technology | 1 |
|
| |||
| 地面观测站 | |||
|
surface observation station : 3 phrases in 3 subjects |
| Explosives and Explosive Ordnance Disposal | 1 |
| Surveying | 1 |
| Technology | 1 |