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| система наблюдений | |||
| система наблюдения | |||
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观测 系统 : 37 phrases in 8 subjects |
| Astronomy | 1 |
| Aviation | 2 |
| Ecology | 1 |
| Electronics | 1 |
| General | 17 |
| Seismology | 2 |
| Technology | 5 |
| United Nations | 8 |
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