SIS SS 02 52 64-1988 Building acoustics - Measurement of reverberation time in moms - Test methods《建筑声学 房间混响时间的测量 测试方法》.pdf

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STAS 12203 2-1983 Building acoustics DESIGN OF ANECHOIC AND SE- MIANEGHOIC ROOMS General requirements《建筑声学 无回声和半无声设计房间的总体要求 》.pdf

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