| |||
| 下套管井 | |||
|
casing hole : 15 phrases in 7 subjects |
| Drilling | 2 |
| Engineering geology | 2 |
| Explosives and Explosive Ordnance Disposal | 2 |
| Geophysics | 3 |
| Oil / petroleum | 1 |
| Solar power | 1 |
| Technology | 4 |
| |||
| 下套管井 | |||
|
casing hole : 15 phrases in 7 subjects |
| Drilling | 2 |
| Engineering geology | 2 |
| Explosives and Explosive Ordnance Disposal | 2 |
| Geophysics | 3 |
| Oil / petroleum | 1 |
| Solar power | 1 |
| Technology | 4 |