concourse-connection longitudinal-transverse auto-telephone exchange
汇接用纵横制自动电话交换机
crossbar automatic telephone system
纵横制自动电话交换机
crossbar private automatic branch exchange system
纵横制自动电话小交换机
Relays for crossbar telephone switching systems
GB/T3972-1992纵横制电话交换机用继电器
crossbar automatic exchange system
纵横制自动交换方式
"Present-day telephone-circuit switching equipment is based on either electromechanical techniques (employing crossbar, Strowger, or rotary switches)"
目前，电话的电路交换设备或以机电技术(采用纵横制、步进制或旋转式接线器)，
machine driven switching system
机动制自动电话交换机
Technical requirements and testing methods for crossbar private automatic branch exchange
GB/T5322-1985纵横制用户电话交换机技术要求和试验方法
private automatic telephone exchange
专用自动电话交换机
step-by-step system local automatic telephone exchange
步进制市内用自动电话交换机
selecting chain
(纵横制交换机中的)互斥电路
Technical requirements and testing methods for local crossbar telephone switching systems
GB/T6878-1986纵横制市内电话交换机技术要求和试验方法
A private telephone exchange that automatically connects internal "branch" lines to the external circuits of a telephone system.
一种自动地将内部用户线连接到电话系统外线的专用电话交换机。
computer telephone exchange
电脑自动电话交换机
all relay automatic telephone system
全继电器制自动电话交换机
automatic local exchange
市内电话自动交换机
automatic toll switching system
长途电话自动交换机
unit automatic exchange
内部自动电话交换机