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母 流 : 36 phrases in 12 subjects |
Aviation | 2 |
Biology | 1 |
Drilling | 3 |
Electronics | 9 |
Explosives and Explosive Ordnance Disposal | 1 |
Hydroelectric power stations | 3 |
Information technology | 1 |
Metallurgy | 1 |
Shipbuilding | 1 |
Space | 2 |
Technology | 8 |
Wind Energy | 4 |