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阶形的 : 18 phrases in 10 subjects |
Architecture | 1 |
Bridge construction | 2 |
Electronics | 1 |
Engineering geology | 1 |
Explosives and Explosive Ordnance Disposal | 1 |
General | 3 |
Hydroelectric power stations | 1 |
Metallurgy | 1 |
Oil / petroleum | 1 |
Technology | 6 |