标题: 求 ISO 11654-1997 Acoustics -- Sound absorbers for use in buildings -- Rating o [打印本页] 作者: a1s2d3f4 时间: 2020-3-18 10:05:53 标题: 求 ISO 11654-1997 Acoustics -- Sound absorbers for use in buildings -- Rating o
求 ISO 11654-1997 Acoustics -- Sound absorbers for use in buildings -- Rating of sound absorption 作者: liuxilin1215 时间: 2020-3-18 10:05:54
ISO 11654-1997 Acoustics - Sound absorbers for use in buildings - Rating of sound absorption