deteeting the ground point with low frequency electric current signal changing its frequency  低频信号变频探测

few ground control point  少控制点

GCP Ground Control Point  地面控制点

ground control point  地面控制点GCP; 控制点; 地面控制点

ground control point for aerial photography  对空地标点

ground elevation control  地面提升控制

The wrong of elevation point with contour line  点线矛盾

air-ground control radio station  氯丙嗪（CPZ）; 陆空控制无线电台

airport ground control tower  机场地面管制台

assumed ground elevation  假地面高程

common ground point  公共接地点

common-ground-point  共地面点

COMPOSITE GROUND WITH DOUBLE SOIL STRATA  复合双层地基

composite ground with granular columns  海藻; 散体材料桩复合地基

composite ground with rigid piles  刚性桩

conical flask with ground-in glass stopper  带磨砂玻塞烧瓶

coordination with ground environment  与地面环境协调

cover ground with plastic film  地膜覆盖

covering with ground sheeting  地膜覆盖