单项选择题
A.顶轮器B.撬棍C.镐头D.镐把
A.<2km/hB.<4km/hC.<6km/hD.<5km/h
A.0~400TB.0~680TC.0~720TD.0~600T
A.0~125TB.0~160TC.0~170TD.0~180T
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