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| 电子模拟 | |||
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electronic analog : 30 phrases in 9 subjects |
| Air defense | 1 |
| Earth sciences | 1 |
| Electronics | 7 |
| Engineering geology | 1 |
| General | 5 |
| Mathematics | 2 |
| Shipbuilding | 1 |
| Space | 7 |
| Technology | 5 |
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