 |
| |||
| ★ 作用效应系数 | |||
|
coefficient of action effect : 2 phrases in 2 subjects |
| Bridge construction | 1 |
| Hydroelectric power stations | 1 |
|
| |||
| ★ 作用效应系数 | |||
|
coefficient of action effect : 2 phrases in 2 subjects |
| Bridge construction | 1 |
| Hydroelectric power stations | 1 |