magneto switchboard 磁石式交换机

magneto switchboard exchange 磁石式交换机

magneto-switchboard exchange [通信] 磁石式交换台

single-position magneto switchboard 单座席电磁式交换台

single position magneto switchboard 单座席磁石交换机

magneto telephone switchboard 磁石电话交换机

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 wires 磁电机点火线

magneto telephone switchboard shaft 磁电机轴