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[单选题]
燕尾型外锁闭装置心轨第一、二牵引点的锁闭杆下平面与工务拉杆应保持()以上间隙。
A.1mm
B.2mm
C.3mm
D.4mm
查看答案
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A.1mm
B.2mm
C.3mm
D.4mm
A.2mm
B.4mm
C.6mm
D.8mm
A.双杠内锁,可挤
B.双杠内锁,不可挤
C.单杆内锁,可挤
D.单杆内锁,不可挤
A.双杠内锁,可挤
B.双杠内锁,不可挤
C.单杆内锁,可挤
D.单杆内锁,不可挤
A.1mm
B.2mm
C.3mm
D.4mm