程控交换机 meaning in Chinese

programmed controlled exchange
spc exchange

Alteration of power supply system in program - control
程控交换机电源系统改造
Supervise telecom exchanger & desk phone installation
监督程控交换机和桌上电话的安装
Discussing about pbx management and maintenance
程控交换机的管理和维护
Design and realization of the small digital program controlled exchange
小型数字程控交换机的设计与实现
A single chip l296 power supply designed for using in small program controlled switchboard
296在矿用小型程控交换机电源中的应用

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