With the utility model, once someone calls stealthily on the lines of cardphones or IC card telephones of post and telegraph offices, operators on duty in a measurement room can immediately know.
使用该报警器，一旦有人在邮电局的磁卡电话或IC卡电话线上盗打电话，测量室值班人员立即能获知。
With the utility model, once someone calls stealthily on the lines of cardphones or IC card telephones of post and telegraph offices, operators on duty in a measurement room can immediately know.
使用该报警器，一旦有人在邮电局的磁卡电话或IC卡电话线上盗打电话，测量室值班人员立即能获知。
应用推荐