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| acoustical sounding (测深、测距) | |||
| acoustic detection; acoustic sounding | |||
| acoustic investigation; acoustical investigation; acoustical sounding | |||
|
声 学探测 : 15 phrases in 7 subjects |
| Acoustics | 2 |
| Air defense | 1 |
| Aviation | 2 |
| Earth sciences | 3 |
| Electronics | 2 |
| Name of organization | 1 |
| Space | 4 |
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