介绍了锅炉吹灰器枪管环缝焊接机床的基本组成和工艺过程，设计了基于可编程控制器的电气控制系统和软件系统。
The technological process and the basic construction of a encircling weld lathe for boiler sootblower's pipe are described in this paper.
过程控制中，大量控制系统是由基本PID控制单元组成。
Most of real industrial processes are controlled by PID controllers.
介绍了笔者参与研发的一套用于大型火力发电厂生产过程控制的现场总线控制系统的基本功能和整体结构，着重描述系统研发中的两项关键技术。
A set of FCS which the author has developed as a participant was introduced by describing its basic functions and entire structure while emphasizing two key techniques.
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