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| 消声吸声器; 消声〔吸声〕器 | |||
| 消声器 | |||
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| 消声吸声器 | |||
| 声阻尼器 | |||
| 消声器 | |||
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acoustical damper : 1 phrase in 1 subject |
| Aviation | 1 |
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