步骤、状态和动作 Step, Status, and Action
从动作原理和状态反馈这两个回路入手。分析本公司热电站快速启闭阀的故障现象，并对故障分析步骤作了详细总结。
Based on the principle and state feedback, failure phenomenon of switch valve in thermal power stations is investigated, and fault analysis steps are concluded in detail.
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