... 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。
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。
The Digital Program Control Switch System, which based on the circuit switch, is still the main means of telecommunication field and plays an important role in the telecom network system.
以电路交换为基础的程控交换技术在当前的通信网中占有重要比重，它仍是当前通信的主要手段和研究内容。
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