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| acoustic detector; sonic detector; sound probe; sound locater | |||
| acoustical detector | |||
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声波探测器 : 16 phrases in 9 subjects |
| Acoustics | 2 |
| Air defense | 1 |
| Aviation | 1 |
| Earth sciences | 1 |
| Electronics | 1 |
| Geophysics | 1 |
| Metallurgy | 1 |
| Space | 2 |
| Technology | 6 |
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