| |||
yearly mean level |
年平均 水 平 : 53 phrases in 11 subjects |
Bridge construction | 5 |
Desert science | 1 |
Earth sciences | 3 |
Engineering geology | 2 |
Hydroelectric power stations | 6 |
Hydrology | 2 |
Metallurgy | 1 |
Rail transport | 1 |
Technology | 30 |
United Nations | 1 |
Wind Energy | 1 |