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本文以高炉鼓风加湿系统中的“双调节阀”控制为例，主要论述怎样对ＷＤＰＦ系统实现无扰动切换。
In this paper, the “dual control valve” control in the blast furnace humidification system is taken as an example to discuss how to switch the WDPF system undisturbed.