标准查询 标准查询声学.建筑物和建筑构件内的隔音率.第2部分:地板冲击噪音隔绝
Acoustics -- Rating of sound insulation in buildings and of building elements -- Part 2: Floor impact sound insulation
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标准查询Acoustics -- Rating of sound insulation in buildings and of building elements -- Part 2: Floor impact sound insulation
