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| aircraft noise | |||
| aircraft noise Effective sound output of the various sources of noise associated with aircraft operation, such as propeller and engine exhaust, jet noise, and sonic boom (航空器运转所产生的各种噪音输出，噪音来源包括螺旋桨、引擎排气、喷射噪音和超声波音爆等) | |||
| 航空 器噪声: 2 phrases in 1 subject |
| Aviation | 2 |
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