floor pattern magneto telephone switchboard 磁石落地式电话交换机

magneto telephone switchboard lever 磁电机操纵杆

magneto telephone switchboard sensor 磁敏元件

magneto telephone switchboard switch 磁电机开关

magneto telephone switchboard ringer 磁石式振铃器

magneto telephone switchboard ringing 磁石式振铃

magneto telephone switchboard winding 永磁绕组

magneto telephone switchboard wires 磁电机点火线

magneto telephone switchboard shaft 磁电机轴