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扫描盘 : 20 phrases in 10 subjects |
| Aviation | 1 |
| Construction | 3 |
| Earth sciences | 1 |
| Electronics | 4 |
| Exhibitions | 1 |
| General | 1 |
| Project management | 1 |
| Space | 1 |
| Technology | 6 |
| Telecommunications | 1 |
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