集 中 荷载 : 41 phrases in 10 subjects |
Bridge construction | 4 |
Electric machinery | 1 |
Electronics | 2 |
Engineering geology | 1 |
Explosives and Explosive Ordnance Disposal | 3 |
Hydroelectric power stations | 2 |
Metallurgy | 2 |
Space | 2 |
Technology | 23 |
Transport | 1 |