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| 电子扫描系统 | |||
| electronic scanning system: 9 phrases in 8 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Earth sciences | 1 |
| Electronics | 1 |
| General | 1 |
| Geology | 1 |
| Information technology | 1 |
| Space | 2 |
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