The research procedures of event tree analysis are to determine the initial event, list events in the process, chart and analyze event tree.
事件树分析法的研究步骤包括确定初始事件、环节事件，绘制、分析事件树图。
The research procedures of event tree analysis are to determine the initial event, list events in the process, chart and analyze event tree.
事件树分析法的研究步骤包括确定初始事件、环节事件，绘制、分析事件树图。
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