 |
| |||
| flat gradient | |||
| glacis | |||
| shelving | |||
| 缓 斜坡: 7 phrases in 5 subjects |
| Drilling | 1 |
| Engineering geology | 1 |
| Hydroelectric power stations | 1 |
| Oil / petroleum | 1 |
| Technology | 3 |
|
| |||
| flat gradient | |||
| glacis | |||
| shelving | |||
| 缓 斜坡: 7 phrases in 5 subjects |
| Drilling | 1 |
| Engineering geology | 1 |
| Hydroelectric power stations | 1 |
| Oil / petroleum | 1 |
| Technology | 3 |