crossbar systern automatic telephone exchange
automatic telephone exchange
automatic telephone exchange system
longitudinal-transverse system automatic telephone exchange
private automatic telephone exchange
SEAF Stock Exchange Automatic Exchange Facility
step-by-step system local automatic telephone exchange
crossbar type automatic telephone switch board
longitudinal-crossbar auto-telephone exchange
all relay automatic telephone system
全继电器制自动电话交换机
全继电器制自动电话系统
全体呼叫
Automatic Exchange
自动更换
自动切换
自动交换所
自动交换自动交换机
自动交换
自动话局
自动交换机
自动电话交换机
automatic exchange device
automatic exchange operation
automatic exchange rates accumulation system
automatic exchange technique
Automatic Telephone Call
automatic telephone charging equipment
automatic telephone pay station