隔声门大小和隔声性能可按隔声等级要求、安装空间、防火等级选定。

The size and the sound reduction performance of the sound-proof door can be customized according to the sound insulation level, installation room and fire rating.

youdao

隔声门大小和隔声性能可按隔声等级要求、安装空间、防火等级选定。

The size and the sound reduction performance of the sound-proof door can be customized according to the sound insulation level, installation room and fire rating.

youdao