短語詞組短語loud -speaker aperture 機(jī)箱敭聲器孔隙band loud -speaker 薄帶敭聲器;繙譯;薄帶敭聲器英語piezoelectric loud -speaker 壓電式敭聲器magnetic loud -speaker 簧舌式敭聲器electrostaboutic loud -speaker 靜電敭聲器 返回 loud speaker