单词vertical angles
n.: 对顶角
网络: 公路
对顶角
A surveying instrument similar to a theodolite that measures horizontal and vertical angles.
中星仪一种类似于测量水平或垂直角度的测伟仪的测量器具
Three-dimensional position by two-point intersection involves two vertical angles
加测竖角的双点后方交会三维定位