标准查询 标准查询声学 - 建筑和建筑构件隔声等级 - 第1部分: 气载声隔音
Acoustics - Rating of sound insulation in buildings and of building elements - Part 1: airborne sound insulation
标准查询Acoustics - Rating of sound insulation in buildings and of building elements - Part 1: airborne sound insulation
