 |
| |||
| creation of disaster-proof districts | |||
| crater lake; caldera lake | |||
|
火山口湖 : 4 phrases in 3 subjects |
| Desert science | 1 |
| Engineering geology | 1 |
| Hydroelectric power stations | 2 |
|
| |||
| creation of disaster-proof districts | |||
| crater lake; caldera lake | |||
|
火山口湖 : 4 phrases in 3 subjects |
| Desert science | 1 |
| Engineering geology | 1 |
| Hydroelectric power stations | 2 |