单项选择题X 纠错
A.不短于4.5m B.大于6m,短于6.5m C.不短于6m D.大于4.5m,短于6m
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单项选择题
A.450m B.600m C.700m D.800m
A.捣固密实 B.顺坡 C.夯拍道床 D.拧紧扣件
A.1‰ B.2‰ C.1.5‰ D.2.5‰
A.3‰ B.4‰ C.6‰ D.8‰
A.1435mm B.1440mm C.1445mm D.1450mm
A.1450mm B.1445mm C.1437mm D.1435mm
A.1.5‰ B.2‰ C.2.5‰ D.3‰
A.15mm B.20mm C.25mm D.30mm
A.2‰ B.2.5‰ C.3‰ D.3.5‰
A.起道 B.拨道 C.改道 D.矫直钢轨
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