隐患 : 49 phrases in 17 subjects |
Automobiles | 3 |
Aviation | 1 |
China | 13 |
Computer networks | 1 |
Cryptography | 2 |
Drilling | 2 |
Economy | 1 |
Engineering geology | 1 |
Explosives and Explosive Ordnance Disposal | 4 |
Finances | 3 |
Hydroelectric power stations | 2 |
Information technology | 1 |
Metallurgy | 1 |
Plastic surgery | 1 |
Proverb | 1 |
Rail transport | 2 |
Technology | 10 |