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问题详情

Which of the listed sections of an emergency switchboard is used to supply power for alarm signals under emergency conditions?（）

A、The generator and bus transfer section

B、The 450 volt, 60 cycle, 3 phase bus

C、The 120 volt, 3 phase, 60 cycle bus

D、The 24 volt DC bu

时间：2022-01-04 11:24 关键词：船舶电气与船舶安全

答案解析

D

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