ICS91.120.30A59荡黔中华人.民共和国国家标准GB/T19889.4-2005/ISO140-4:1998声学建筑和建筑构件隔声测量第4部分:房间之间空气声隔声的现场测量Acoustics-Measurementofsoundinsulationinbuildingsandofbuildingelements-Part4:Fieldmeasurementsofairbornesoundinsulationbetw...

时间:2024-12-23 05:09栏目:公检法

ICS91.120.30A59荡黔中华人.民共和国国家标准GB/T19889.4-2005/ISO140-4:1998声学建筑和建筑构件隔声测量第4部分:房间之间空气声隔声的现场测量Acoustics-Measurementofsoundinsulationinbuildingsandofbuildingelements-Part4:Fieldmeasurementsofairbornesoundinsulationbetw...

时间:2026-03-22 13:52栏目:标准规范