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Acoustics factsheet - NHBC Home
瀏覽:670
日期:2026-04-18
Mean: 61 dB L'nT,w. Ind: 65 dB L'nT,w. Dwelling-houses and flats formed by
material change of use (conversion). – Walls. – Floors and stairs. 43 dB DnT,w +
Ctr....看更多







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