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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




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