 |
| |||
| 梯度线 | |||
|
gradient line : 27 phrases in 7 subjects |
| Aviation | 1 |
| Bridge construction | 1 |
| Engineering geology | 2 |
| Hydroelectric power stations | 9 |
| Oil / petroleum | 2 |
| Rail transport | 1 |
| Technology | 11 |
|
| |||
| 梯度线 | |||
|
gradient line : 27 phrases in 7 subjects |
| Aviation | 1 |
| Bridge construction | 1 |
| Engineering geology | 2 |
| Hydroelectric power stations | 9 |
| Oil / petroleum | 2 |
| Rail transport | 1 |
| Technology | 11 |