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[主观题]
60kg/m钢轨无缝线路维修周期为()。A.50~70MtB.100~150MtC.60~90MtD.120~180Mt
60kg/m钢轨无缝线路维修周期为()。
A.50~70Mt
B.100~150Mt
C.60~90Mt
D.120~180Mt
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60kg/m钢轨无缝线路维修周期为()。
A.50~70Mt
B.100~150Mt
C.60~90Mt
D.120~180Mt
(计算参数:60kg/m钢轨,断面积为77.45cm2,道床纵向阻力r=80N/cm)