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内部级 : 10 phrases in 9 subjects |
| Economy | 1 |
| Electronics | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 1 |
| Name of organization | 1 |
| Project management | 1 |
| Securities | 1 |
| Space | 1 |
| Technology | 2 |
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