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| 41. | multiple barrier |
| 多重屏障 |
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| 42. | acoustical duct lining |
| 风道隔音衬里 |
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| 43. | A consultancy study is under way to assess the technical feasibility of installing noise barriers and enclosures on existing roads for formulating necessary strategies and plans to mitigate excessive traffic noise. |
| 另外又展开了顾问研究，评估在现有道路装置隔音屏障及隔音罩在技术上的可行性，以便制订各项消减过量道路噪音的策略和计划。 |
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| 44. | barrier properties |
| 屏障性能 |
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| 45. | filtration Barrier |
| 滤过屏障 |
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| 46. | mountain barrier |
| 高山屏障 |
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| 47. | Ecological protective screen |
| 生态屏障 |
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| 48. | reflection barrier |
| 反射屏障 |
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| 49. | photoelectric barrier |
| 光电屏障 |
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| 50. | visual screening |
| 景观屏障 |
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