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一、用方向角进行前方交会A.用简单的计算机计算前方交会的起始值系应用已知点A与B的座标以及该两已知点对新点N的方向角,或倾斜角。
First, the forward angle with the direction of the intersection A. A simple computer calculates the initial value of the forefronts by applying the coordinates of the known points A and B and the direction angle or tilt angle of the two known points to the new point N.