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拟实的 : 14 phrases in 9 subjects |
| Air defense | 1 |
| Electronics | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 2 |
| International trade | 1 |
| Mining | 2 |
| Project management | 2 |
| Technology | 1 |
| Telecommunications | 3 |
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