The most important acoustical property is the sound insulating or absorbing quality of the material.
最重要的声学特性是隔音或吸音材料的质量。
The utility model has reasonable structure and good sound-insulating effect.
本实用新型结构合理，隔音效果好。
The utility model has reasonable structure and good sound-insulating effect.
本实用新型结构合理，隔音效果好。
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