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断路器采用直流220V控制电源在做低电压动作试验时,施加()电压机构不应动作A.66VB.143VC.175VD.2
断路器采用直流220V控制电源在做低电压动作试验时,施加()电压机构不应动作
A.66V
B.143V
C.175V
D.220V
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断路器采用直流220V控制电源在做低电压动作试验时,施加()电压机构不应动作
A.66V
B.143V
C.175V
D.220V
A.直流
B.交流
C.UPS
D.蓄电池
A.1
B.2
C.3
D.24%以上
A.10~20A10%
B.10~30A5%
C.10~20A5%