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| ocean surveillance system | |||
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海 洋 监视系统 : 19 phrases in 8 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Cartography | 1 |
| Earth sciences | 3 |
| Electronics | 1 |
| Navigation | 4 |
| Space | 5 |
| Technology | 3 |
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