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| underwater acoustic system; underwater acoustical system; underwater sound system | |||
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水声系统 : 37 phrases in 12 subjects |
| Air defense | 2 |
| Aviation | 1 |
| Earth sciences | 1 |
| Electronics | 5 |
| General | 2 |
| Geophysics | 2 |
| Information technology | 1 |
| Nautical | 3 |
| Navigation | 4 |
| Oil / petroleum | 3 |
| Space | 3 |
| Technology | 10 |
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