| |||
| ★ 结构重要性系数 | |||
|
structure importance coefficient : 2 phrases in 2 subjects |
| Bridge construction | 1 |
| Hydroelectric power stations | 1 |
| |||
| ★ 结构重要性系数 | |||
|
structure importance coefficient : 2 phrases in 2 subjects |
| Bridge construction | 1 |
| Hydroelectric power stations | 1 |