纵横制自动电话交换机 meaning in English

cro ar automatic telephone exchange
cro ar type automatic telephone switch board
crossbar automatic telephone exchange
crossbar automatic telephone system
crossbar dial exchange
crossbar type automatic telephone switch board
crossbar type automatic telephone switchboard
longitudinal-cro ar auto-telephone exchange
longitudinal-crossbar auto-telephone exchange
longitudinal-tra verse system automatic telephone exchange
longitudinal-transverse system automatic telephone exchange