自由水面: 35 phrases in 11 subjects |
Bridge construction | 1 |
Earth sciences | 1 |
Ecology | 1 |
Explosives and Explosive Ordnance Disposal | 2 |
Geophysics | 2 |
Hydroelectric power stations | 3 |
Mining | 1 |
Nautical | 1 |
Oil / petroleum | 1 |
Technology | 21 |
Water resources | 1 |