| |||
| 表层井段 | |||
| 地表层井段 | |||
| 下表面套管的钻孔; 地面钻孔; 地表钻孔 | |||
|
surface-hole : 14 phrases in 7 subjects |
| Drilling | 2 |
| Earth sciences | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Foreign trade | 1 |
| Mining | 1 |
| Oil / petroleum | 4 |
| Technology | 4 |
| |||
| 表层井段 | |||
| 地表层井段 | |||
| 下表面套管的钻孔; 地面钻孔; 地表钻孔 | |||
|
surface-hole : 14 phrases in 7 subjects |
| Drilling | 2 |
| Earth sciences | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Foreign trade | 1 |
| Mining | 1 |
| Oil / petroleum | 4 |
| Technology | 4 |