单项选择题
A.水准仪 B.经纬仪 C.全站仪 D.测距仪
A.激光设备 B.GPS C.指南针 D.经纬仪
A.1 B.2 C.3 D.4
A.150m,50m B.200m,500m C.200m,70m D.250m,70m
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