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数据管理 信息 系统 : 28 phrases in 9 subjects |
| Air defense | 3 |
| Aviation | 6 |
| Business | 1 |
| Computers | 1 |
| Earth sciences | 5 |
| Electronics | 7 |
| Horticulture | 1 |
| Space | 3 |
| Telecommunications | 1 |
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