Its advantages are simple structure, low cost and high noise suppressing effect.

本发明的有益效果是：结构简单、成本低廉、噪声抑制性能好。

youdao

Its advantages are simple structure, low cost and high noise suppressing effect.

本发明的有益效果是：结构简单、成本低廉、噪声抑制性能好。

youdao