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| 声波换能器; 传声器 | |||
| 声换能器 | |||
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acoustic transducer : 22 phrases in 7 subjects |
| Earth sciences | 1 |
| Electric machinery | 1 |
| Electronics | 6 |
| Geophysics | 1 |
| Oil / petroleum | 4 |
| Space | 1 |
| Technology | 8 |
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