短語(yǔ)詞組短語(yǔ)piezoelectric crystal loudspeaker 壓電晶體揚(yáng)聲器piezoelectric ceramic loudspeaker 壓電陶瓷揚(yáng)聲器Piezoelectric full -range loudspeaker 發(fā)明名稱 返回 piezoelectric loudspeaker