sound amplifying system的意思|示意

扩音系统 ...e sound-amplifying equipment 限制或禁止使用复印设备 sound amplifying system 扩音系统 ; 扩声系统 sound amplifying systems 扩声系统 ..

扩声系统 ...筑 扩声系统 语言清晰度 最大声压级 声场不均匀度 线阵列扬声器 [gap=186]Keywords： sports building, sound amplifying system, distinctness of language, the largest sound pressure level, nonuniformitry of ..

吸音力 ... 吸音剂 sound absorber 吸音力 sound amplifying system 吸音棉 glass down ...