文章简要介绍了日立h - 600型电子显微镜抽真空系统，分析了抽真空程序及其程序控制电路。
The paper simply introduces the evacuation system for model H-600 electron microscope and analyzes the program of evacuation and the program control circuit.
本文介绍了KLG - 50型空气等离子弧切割机的主回路，控制电路和程序控制电路的工作原理及调试结果。
The principle and adjustment result re of the main circuit, control circuit and program control circuit of our KLG-50 plasma arc cutting machine are introduced in this paper.
本机型应用国外先进技术，采用先进的程序控制电路，性能可靠，对不同程度的事故车辆作不解体维修，且操作简单。
This spot welder bring in advanced technique of procedure to control circuit with stable characteristics and simple to operate.
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