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| 信息检索服务 | |||
| 信息检索业务 | |||
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| 情报检索处 | |||
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information retrieval service : 11 phrases in 5 subjects |
| Aviation | 1 |
| Electronics | 4 |
| Space | 2 |
| Technology | 2 |
| Telecommunications | 2 |
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