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根据制冷工艺对氨泵系统的要求，介绍了ＰＬＣ控制系统的组成、控制原理及系统中一些技术问题的处理方法。
According to the requirements of the ammonia pump system in the refrigeration process, the composition of the PLC control system, the control principle and the processing methods of some technical problems in the system are introduced.