牢固 的 : 42 phrases in 15 subjects |
Architecture | 3 |
Automobiles | 2 |
Business | 1 |
China | 1 |
Commerce | 2 |
Drilling | 1 |
Economy | 3 |
Explosives and Explosive Ordnance Disposal | 1 |
General | 10 |
Hydroelectric power stations | 2 |
Mechanic engineering | 1 |
Metallurgy | 3 |
Shipbuilding | 2 |
Technology | 7 |
Telecommunications | 3 |