安 全 区 : 102 phrases in 25 subjects |
Advertising | 1 |
Agriculture | 1 |
Air defense | 1 |
Architecture | 1 |
Automobiles | 1 |
Aviation | 14 |
Bridge construction | 1 |
Business | 3 |
China | 2 |
Cryptography | 2 |
Drilling | 1 |
Ecology | 2 |
Electronics | 13 |
Explosives and Explosive Ordnance Disposal | 9 |
Geophysics | 1 |
Hydroelectric power stations | 2 |
Metallurgy | 1 |
Name of organization | 7 |
Nautical | 3 |
Oil / petroleum | 1 |
Rail transport | 2 |
Space | 8 |
Technology | 18 |
United Nations | 5 |
Wind Energy | 2 |