 |
| |||
| 河床比降 | |||
| 河底坡降 | |||
| bed gradient: 9 phrases in 4 subjects |
| Bridge construction | 2 |
| Engineering geology | 1 |
| Hydroelectric power stations | 3 |
| Technology | 3 |
|
| |||
| 河床比降 | |||
| 河底坡降 | |||
| bed gradient: 9 phrases in 4 subjects |
| Bridge construction | 2 |
| Engineering geology | 1 |
| Hydroelectric power stations | 3 |
| Technology | 3 |