曲线半径()曲线地段作业轨温为15℃至零下20℃时,连续扒开道床不超过25m,起道高度不超过30mm,拨道量不超过10mm
A.700m≤R<1500m B.800m≤R<2000m C.1000m≤R<2200m D.1200m≤R<2400m正确答案B
曲线半径()曲线地段作业轨温为15℃至零下20℃时,连续扒开道床不超过25m,起道高度不超过30mm,拨道量不超过10mm
A.700m≤R<1500m B.800m≤R<2000m C.1000m≤R<2200m D.1200m≤R<2400m正确答案B