English translation for "声力电话系统"

sound-powered telephone system

Similar Words：

"声力" English translation, "声力波" English translation, "声力传声器" English translation, "声力电话" English translation, "声力电话机" English translation, "声力级" English translation, "声力灵敏度" English translation, "声力送话器" English translation, "声量" English translation, "声量保证期" English translation