【单选题】
KP-2A控制箱触发器回路的主要元件CW1的作用是在电路中起___作用。
A. 稳压输出
B. 电源电压
C. 电压比较
D. 工作电压
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答案
C
解析
暂无解析
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在客车A1级检修时,应急电源电池电压低于___时,欠压保护须起作用。
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【单选题】
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同一组蓄电池中各个蓄电池的容量互差不得超过___。
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