1 . voice pipe whistle
voice operated device antisinging 音控防鸣voice pipe whistle 传话筒voice pipe 传话筒传声筒
2 . voice tube
voice rotating beacon 旋转音响信标voice tube 传话筒voice tube 传声筒
3 . speaking pipe
speaking curret 通话电流speaking pipe 传话筒speaking terminal 传话口
4 . Speaking tubes
090417 车辆用收音机 Vehicle radios090017 传话筒Speaking tubes090078 磁带 Magnetic tapes