 |
| |||
| 斜坡排水 | |||
| 坡道排水 | |||
| slope drainage: 17 phrases in 5 subjects |
| Bridge construction | 1 |
| Engineering geology | 3 |
| Hydroelectric power stations | 3 |
| Metallurgy | 3 |
| Technology | 7 |
|
| |||
| 斜坡排水 | |||
| 坡道排水 | |||
| slope drainage: 17 phrases in 5 subjects |
| Bridge construction | 1 |
| Engineering geology | 3 |
| Hydroelectric power stations | 3 |
| Metallurgy | 3 |
| Technology | 7 |