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| 声音消减; 消声 | |||
| 声衰减 | |||
| 声的衰减 | |||
| |||
| 声衰减 | |||
| 声的衰减 | |||
| acoustical attenuation: 6 phrases in 5 subjects |
| Electronics | 1 |
| Geophysics | 1 |
| Information technology | 1 |
| Oil / petroleum | 1 |
| Technology | 2 |
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