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Concerning the incinerator’s operation, which of the following is not correct?（）
A:Scavenging time should be more 30 seconds before igniting
B:The temperature of sludge tank is 80~100℃
C:First igniting the incinerator with diesel oil, when the temperature of health is about 600℃, the sludge oil drawn in
D:The ash can be dumped into sea when the distance is more than 3 miles from land

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出自：海船船员证

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