 |
| |||
| 应力矩阵 | |||
| stress matrix: 8 phrases in 4 subjects |
| Drilling | 1 |
| Explosives and Explosive Ordnance Disposal | 3 |
| Oil / petroleum | 2 |
| Technology | 2 |
|
| |||
| 应力矩阵 | |||
| stress matrix: 8 phrases in 4 subjects |
| Drilling | 1 |
| Explosives and Explosive Ordnance Disposal | 3 |
| Oil / petroleum | 2 |
| Technology | 2 |