标准查询 标准查询声学. 建筑和建筑构件的隔声标定. 第1部分: 空气声隔声
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
