over-head line (aerial line)
overhead line [= aerial line]
direction of the surveying line
Double line-line voltage control
line-line extreme distance
line-line topological relation in traffic network
surveying-line and checking-line sounding data
Aerial Surveying
航空测量
架空索道
航空摄影测量
航天摄影测量
航测
控制力矩陀螺
Aerial Surveying and Remote Sensing
Aerial Surveying and Remote Sensing Technology
aerial surveying and remote surveying