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用地标 : 16 phrases in 10 subjects |
| Aviation | 1 |
| Earth sciences | 2 |
| Economy | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 2 |
| Hydroelectric power stations | 1 |
| Project management | 2 |
| Rail transport | 1 |
| Space | 1 |
| Technology | 4 |
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