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Noise Reduction - Soundproof Windows | Double Glazing Sydney | Soundproof Doors
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日期：2025-05-02
Noise Reduction by Sound Barrier to reduce the impact of noise ... Noise levels are measured as sound pressure levels, expressed in decibels (dB); 0 being the lowest threshold of human hearing up to 140 dB resulting in inner ear damage and pain....看更多
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