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子模型 : 49 phrases in 9 subjects |
| Antennas and waveguides | 1 |
| Chemistry | 2 |
| Computers | 1 |
| Electronics | 5 |
| General | 23 |
| Mathematics | 1 |
| Oil processing plants | 1 |
| Physics | 1 |
| Technology | 14 |
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