单项选择题
A.装渣 B.运渣 C.堆渣 D.卸渣
A.18V B.36V C.22V D.49V
A.5m B.20m C.15m D.10m
A.25~40m;1.5m B.10~20m;2.0m C.10~20m;1.5m D.25~40m;2.0m
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