长途电话自动交换机 automatic toll switching system
市内电话自动交换机 automatic local exchange
电报-电话自动交换 automatic switching of telegraph and telephone
电话自动交换系统 automatic telephone switching system
自动电话交换机 automatic exchange ; [通信] automatic telephone switchboard ; dial exchange ; [通信] automatic telephone exchange
自动电话交换系统 automatic telephone switching system
自动电话交换局 [通信] automatic telephone exchange
专用自动电话交换机 [通信] private automatic branch exchange ; private automatic telephone exchange
纵横制自动电话交换机 crossbar automatic telephone exchange ; longitudinal-transverse system automatic telephone exchange ; longitudinal-crossbar auto-telephone exchange ; crossbar automatic telephone system
半自动电话交换机 semi-automatic telephone switch board ; automanualtelephoneswitchboard ; automatic telephone switch board
在自动交换机与电话机方面资本支出的大量增加。
Substantial increases in capital expenditure on automated exchanges and telephones.
史端乔式自动电话交换机形成。
本文介绍电话局自动电话交换设备与机关企业用自动化小交换机间全自动化接续的接口电路。
The automatic connection interface circuits between the PABX and the automatic switch equipments of telephone office are presented in this paper.
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