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| 声学效应; 音响效果 | |||
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| 声学效应; 音响效果 | |||
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acoustical effect : 11 phrases in 6 subjects |
| Aviation | 1 |
| Oil / petroleum | 2 |
| Otorhinolaryngology | 1 |
| Space | 1 |
| Technology | 5 |
| Wind Energy | 1 |
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