surface casing
| vent
| surface casing | |
| met. | 表层套管 |
| oil | 地面套管 |
| vent | |
| cloth. | 衩口 |
| hydroel.st. | 通风孔 |
| interntl.trade. | 出路; 销路 |
| met. | 孔; 放气孔; 排气孔 |
| mount. | 通气孔 |
| space | 排气道 |
| tech. | 排气 |
| |||
| 表层套管 | |||
| 地面套管 | |||
| 地面套筒; 表面防护罩; 外壳 | |||
|
surface casing : 10 phrases in 4 subjects |
| Drilling | 1 |
| Earth sciences | 5 |
| Oil / petroleum | 2 |
| Technology | 2 |