| |||
| 下井 | |||
| 井下; 井底 | |||
| 潜孔 | |||
|
down-the hole : 31 phrases in 9 subjects |
| Drilling | 3 |
| Earth sciences | 1 |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 6 |
| General | 1 |
| Hydroelectric power stations | 2 |
| Mineralogy | 2 |
| Oil / petroleum | 5 |
| Technology | 10 |
| |||
| 下井 | |||
| 井下; 井底 | |||
| 潜孔 | |||
|
down-the hole : 31 phrases in 9 subjects |
| Drilling | 3 |
| Earth sciences | 1 |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 6 |
| General | 1 |
| Hydroelectric power stations | 2 |
| Mineralogy | 2 |
| Oil / petroleum | 5 |
| Technology | 10 |