Which one is not the normal operation for boiler shutdown?（）
- ACarry out soot blowing if permissible
- BChange fuel supply to diesel oil
- CClose steam stop valves on boiler when pressure is reduced
- DDrain boiler empty when it has cooled dow
问题
Which one is not the normal operation
参考解析：
分类：船舶电气与船舶安全题库
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