踏勘: 74 phrases in 14 subjects |
Agriculture | 1 |
Architecture | 1 |
Bridge construction | 12 |
China | 1 |
Desert science | 2 |
Earth sciences | 1 |
Electronics | 2 |
Engineering geology | 8 |
General | 1 |
Geology | 2 |
Hydroelectric power stations | 3 |
Hydrology | 1 |
Oil / petroleum | 5 |
Technology | 34 |