标准查询 标准查询声学.建筑物和建筑元件的隔音率的确定.第1部分:气载声音的隔离
Acoustics -- Rating of sound insulation in buildings and of building elements -- Part 1: Airborne sound insulation
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标准查询Acoustics -- Rating of sound insulation in buildings and of building elements -- Part 1: Airborne sound insulation
