A new type of porous sound absorbing material was made from super-strength gypsum and glass fiber. 摘要以高強石膏為膠凝材料，內摻玻璃纖維，制備出一種新型多孔吸聲材料。
The paper chooses the appropriate muffler,and experiments with the capability of sound absorption material,and designs the dustproof project. 本文通過(guò)選擇合適的消聲器以及吸聲材料實(shí)驗和防塵方案的設計。
Under the bowl there is a sound-absorbing material. 水缸下面有隔音材料。
The studio's soundproof material is imported from Germany. 這家錄音室的隔音材料是德國進(jìn)口的。
