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法线角 : 36 phrases in 11 subjects |
| Chemistry | 1 |
| Construction | 1 |
| Electronics | 5 |
| Explosives and Explosive Ordnance Disposal | 2 |
| General | 3 |
| Mathematics | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 4 |
| Space | 2 |
| Steel production | 1 |
| Technology | 14 |
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