APL
发表于 2025-3-21 19:32:34
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obsession
发表于 2025-3-21 22:51:18
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Blazon
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流利圆滑
发表于 2025-3-22 08:09:17
Linguistic Study of Evaluation in Writing,e strength, water absorption, water permeability and pulse velocity. Besides that, the acoustic performance of CBA concrete was also examined. The sound absorption coefficient and noise reduction coefficient were determined based on the impedance tube test and reverberation room test.
痛苦一生
发表于 2025-3-22 11:46:24
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Hemiplegia
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价值在贬值
发表于 2025-3-22 17:07:56
Peter Taylor-Gooby,Benjamin Leruthnt of rail transportation has also caused discomfort such as noise pollution to residents living in the city, especially those who live close to railway stations. However, this issue can be solved through noise reduction devices. One of the effective ways to reduce noise is by using noise barriers.
faculty
发表于 2025-3-22 21:29:26
https://doi.org/10.1007/978-3-658-35628-6ormal concrete has a noise reduction coefficient of 0.20. It was observed that the sound absorption coefficient increases when the percentage replacement of fine aggregate in the concrete mixture increases.
带子
发表于 2025-3-23 01:46:06
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令人发腻
发表于 2025-3-23 07:51:35
Environmental Noise,. It describes the increasing number of threats and vulnerabilities and offers strategies for developing solutions. These include discussions of how enterprises can take advantage of new and emerging technologi978-1-4842-1456-5978-1-4842-1455-8