... 程序控制电子束 program electron beam 程序控制开关 program control switch 程序修改插接板 program patching plug ...
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They invented the stored program control switch in the 1970s, as a move toward cost reduction and reliability.
1970年代他们发明了程控交换机，保证了可靠性，降低了成本。
It presents the realization of information query system depending on S-12 digit program control switch command system.
结合s - 12数字程控交换机人机命令查询系统介绍信息查询系统的具体实现。
The most attractive thing is that the Digital Program Control Switch System is widely applied, which is the foundation of the digitalization for the whole network.
其中最引人注目的就是广泛采用了程控数字交换机，为全网的数字化奠定了基础。
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