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失帧 : 29 phrases in 10 subjects |
| Aviation | 3 |
| Cartography | 1 |
| Construction | 2 |
| Electronics | 6 |
| General | 1 |
| Information technology | 4 |
| Scientific | 1 |
| Space | 3 |
| Technology | 3 |
| Telecommunications | 5 |
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