| |||
| 弹性平衡状态 | |||
|
elastic equilibrium state : 5 phrases in 4 subjects |
| Bridge construction | 1 |
| Engineering geology | 1 |
| Hydroelectric power stations | 1 |
| Technology | 2 |
| |||
| 弹性平衡状态 | |||
|
elastic equilibrium state : 5 phrases in 4 subjects |
| Bridge construction | 1 |
| Engineering geology | 1 |
| Hydroelectric power stations | 1 |
| Technology | 2 |