常见例句Loudspeaker van; loudspeaking (or Boom) car; sound truck 宣傳車sound truck;loudspeaking (or boom) car;Loudspeaker van 宣傳車loudspeaking telephone set 敭聲電話機loudspeaking set 敭聲電話機loudspeaking telephone 敭聲電話機 返回 loudspeaking