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论述了风机、水泵节能技术改造的意义。介绍了风机、水泵运行中存在的主要问题。从风机、水泵特性入手，分析了风机、水泵调速的机理及选择原则。
Discusses the fan, pump energy-saving technological transformation significance. The main problems in the operation of fans and pumps are introduced. Starting from the characteristics of fan and water pump, the principle and selection principle of fan and pump governor are analyzed.