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防 火 的: 62 phrases in 15 subjects |
Air defense | 1 |
Architecture | 3 |
Automobiles | 7 |
Bridge construction | 1 |
Cryptography | 1 |
Drilling | 1 |
Explosives and Explosive Ordnance Disposal | 1 |
Finances | 2 |
General | 6 |
Hydroelectric power stations | 2 |
Nautical | 1 |
Oil / petroleum | 2 |
Project management | 3 |
Space | 4 |
Technology | 27 |