 |
| |||
| 双排炮孔布置 | |||
|
double-row spacing : 3 phrases in 2 subjects |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 2 |
|
| |||
| 双排炮孔布置 | |||
|
double-row spacing : 3 phrases in 2 subjects |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 2 |