单项选择题
ZD6系列电动转辙机的动接点与静接点的接触深度,两侧相差不大于()
A.1.5mm+0.5mm
B.1.5mm-0.5mm
C.1.5mm±0.5mm
D.1.5mm
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单项选择题
A.1.5mm+0.5mm
B.1.5mm-0.5mm
C.1.5mm±0.5mm
D.1.5mm
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