 |
| |||
| 排气〔水〕管 | |||
| 排水管逸气管，油舱的油气溢出管 | |||
| 排水管; 排气管; 逸气管 | |||
| |||
| 卡点以上的钻杆; 自由段套管 | |||
| freeing pipe: 21 phrases in 5 subjects |
| Drilling | 4 |
| Geophysics | 3 |
| Hydroelectric power stations | 1 |
| Oil / petroleum | 12 |
| Technology | 1 |
|
| |||
| 排气〔水〕管 | |||
| 排水管逸气管，油舱的油气溢出管 | |||
| 排水管; 排气管; 逸气管 | |||
| |||
| 卡点以上的钻杆; 自由段套管 | |||
| freeing pipe: 21 phrases in 5 subjects |
| Drilling | 4 |
| Geophysics | 3 |
| Hydroelectric power stations | 1 |
| Oil / petroleum | 12 |
| Technology | 1 |