 |
| |||
| 岩石硬度 | |||
| rock hardness: 13 phrases in 5 subjects |
| Earth sciences | 1 |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 3 |
| Shipbuilding | 1 |
| Technology | 7 |
|
| |||
| 岩石硬度 | |||
| rock hardness: 13 phrases in 5 subjects |
| Earth sciences | 1 |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 3 |
| Shipbuilding | 1 |
| Technology | 7 |