 |
| |||
| centre line of channel; axis of channel | |||
| 航道中线: 11 phrases in 6 subjects |
| Aviation | 1 |
| General | 1 |
| Hydroelectric power stations | 2 |
| Oil / petroleum | 1 |
| Rowing | 1 |
| Technology | 5 |
|
| |||
| centre line of channel; axis of channel | |||
| 航道中线: 11 phrases in 6 subjects |
| Aviation | 1 |
| General | 1 |
| Hydroelectric power stations | 2 |
| Oil / petroleum | 1 |
| Rowing | 1 |
| Technology | 5 |