地质 勘探 : 99 phrases in 12 subjects |
Aviation | 2 |
Bridge construction | 3 |
Desert science | 2 |
Earth sciences | 16 |
Economy | 2 |
Engineering geology | 4 |
Explosives and Explosive Ordnance Disposal | 10 |
Geology | 2 |
Navigation | 1 |
Oil / petroleum | 3 |
Space | 3 |
Technology | 51 |