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拉力计 : 21 phrases in 10 subjects |
Agriculture | 2 |
Bridge construction | 1 |
Engineering geology | 1 |
Explosives and Explosive Ordnance Disposal | 1 |
Hydroelectric power stations | 3 |
Metallurgy | 3 |
Oil / petroleum | 1 |
Otorhinolaryngology | 1 |
Shipbuilding | 1 |
Technology | 7 |