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拍频拍频 : 56 phrases in 10 subjects |
| Astronautics | 1 |
| Computers | 1 |
| Electronics | 6 |
| General | 18 |
| Lasers | 2 |
| Oil processing plants | 1 |
| Radio | 2 |
| Rail transport | 2 |
| Technology | 22 |
| Telecommunications | 1 |
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