| |||
| 柱式采矿法 | |||
|
pillar method : 17 phrases in 4 subjects |
| Explosives and Explosive Ordnance Disposal | 2 |
| Mineralogy | 1 |
| Mining | 5 |
| Technology | 9 |
| |||
| 柱式采矿法 | |||
|
pillar method : 17 phrases in 4 subjects |
| Explosives and Explosive Ordnance Disposal | 2 |
| Mineralogy | 1 |
| Mining | 5 |
| Technology | 9 |