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| noise abatement | |||
| noise reduction | |||
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降 低 噪声 : 24 phrases in 9 subjects |
| Automobiles | 3 |
| Aviation | 4 |
| Ecology | 1 |
| Electronics | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 1 |
| Space | 1 |
| Technology | 10 |
| Telecommunications | 1 |
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