underwater pipeline
| dragging method
| underwater pipeline | |
| el. | 水下管路 |
| hydroel.st. | 水下管道 |
| dragging method | |
| tech. | 拉法 |
| |||
| 水下管路［线］ | |||
| 水下管道 | |||
| 水下管线; 水下管路 | |||
|
underwater pipeline : 4 phrases in 3 subjects |
| Oceanography & oceanology | 1 |
| Oil / petroleum | 2 |
| Technology | 1 |