單項(xiàng)選擇題鋼軌頂面擦傷深度達(dá)到(),波浪型磨損谷深超過(),應(yīng)判為重傷。

A.1~2mm,0.3mm
B.1~2mm,0.4mm
C.1~2mm,0.5mm
D.1~2mm,0.6mm


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