磁石电话机 magneto telephone set ; magnetic telephone apparatus ; telephone set magneto ; magnetic telephone a ara

磁石电话交换机 magneto telephone switchboard ; magneto telephone switch board

便携式磁石电话交换机 portable magneto-telephone switch board

磁石电话机技术条件 Technical requirements for magnetotelephone

磁石电话局 local battery telephone station

磁石式电话机 magneto telephone set ; magnetotelephone ; HC

型磁石电话机 HC

磁石式电话交换机 local battery switchboard ; magnet call telephone exchange ; Magneto Telephone Exchange ; local battery telephone switchboard

磁石式电话 magneto telephone ; local battery telephone ; telephone magneto

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