 |
| |||
| 横向结构物 | |||
| transverse structure: 5 phrases in 4 subjects |
| Bridge construction | 1 |
| Electronics | 2 |
| Hydroelectric power stations | 1 |
| Technology | 1 |
|
| |||
| 横向结构物 | |||
| transverse structure: 5 phrases in 4 subjects |
| Bridge construction | 1 |
| Electronics | 2 |
| Hydroelectric power stations | 1 |
| Technology | 1 |