初 始压力 : 40 phrases in 13 subjects |
Automobiles | 1 |
Compressors | 1 |
Drilling | 1 |
Electronics | 1 |
Engineering geology | 3 |
Explosives and Explosive Ordnance Disposal | 1 |
Hydroelectric power stations | 1 |
Mining | 18 |
Oil / petroleum | 4 |
Oil processing plants | 1 |
Rail transport | 1 |
Space | 1 |
Technology | 6 |