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[单选题]
CRH380B(L)受电弓上臂橡胶止挡检查联控司机室作业人员将受电弓升起,检查上臂橡胶止挡,不得有明显损伤,若出现明显损伤,需()。
A.跟踪观察
B.查明原因
C.立即更换
D.修补
查看答案
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A.跟踪观察
B.查明原因
C.立即更换
D.修补
A.350
B.450
C.550
D.650
A.≤9s
B.≤10s
C.≤6s
A.≤9s
B.≤10s
C.≤6s
A.700kpa
B.600kpa
C.680kpa
D.800kpa