Relocatable sound insulation partitions between classrooms reducing sound interference between two rooms.
安装隔音墙于课室之间，减少相互间的声音干扰。
Relocatable sound insulation partitions between classrooms, reducing sound interference between two rooms.
安装隔音墙于课室之间，减少相互间的声音干扰。
Relocatable sound insulation partitions between classrooms, reducing sound interference between two rooms.
安装隔音墙于课室之间，减少相互间的声音干扰。
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