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当前学科：动车组司机
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CRH380B型动车组每节动车上都配备一台牵引变流器，在供电失效的情况下可以通过牵引变流器中间电路将（）的输出电压继续供给车载电源系统。
A . 辅助变流器
B . 牵引变压器
C . 牵引电机
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