论坛首页 › ISO 国际标准 › ISO 11654-1997 Acoustics - Sound absorbers for use in buildings - Rating of soun

liuxilin1215 发表于 2020-3-18 19:55:47

ISO 11654-1997 Acoustics - Sound absorbers for use in buildings - Rating of soun

ISO 11654-1997 Acoustics - Sound absorbers for use in buildings - Rating of sound absorption

admin 发表于 2020-3-30 21:42:10

谢谢您的分享，金币已奖励！

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