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[单选题]
25Hz轨道电路轨道继电器至轨道变压器间的电缆电阻:旧型不大于()。
A.50Ω
B.60Ω
C.80Ω
D.100Ω
查看答案
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A.50Ω
B.60Ω
C.80Ω
D.100Ω
A.GB3-130/25
B.GB3-260/25
C.BGK-130/25
D.BGK-260/25
A.GB2-130/25
B.GB2-260/25
C.BGK-130/25
D.BGK-260/25
A.145mV±10mV
B.150mV±10mV
C.155mV±10mV
D.160mV±10mV