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NBN S 01-401-1987 3750 Maximal noise levels in buildings《声学 建筑物中的音量等级的限定值以避免引起人的不适》.pdf
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NBNS0140119873750MAXIMALNOISELEVELS
声学
建筑物
中的
音量
等级
限定
避免
引起
不适
PDF
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