给出判断空间两直线相关位置的一种新方法，并可由此直接得出两异面直线间的距离及公垂线的标准方程。
A new criteria method is provided to determine the relative locations of spatial lines, which deduces the distance and the common vertical line of two straight lines in different planes.
两条异面直线的距离也不必要找出公垂线段，只需利用向量的射影性质来解即可。
Two different surface straight lines distance not essential discovers male hangs the line segment, only must solve using the vector projective property then.
提出一种考虑方程组所代表几何意义的方法，利用异面直线公垂线中点去逼近物体空间点。
A model is described which consider the equation geometric meaning, make use of crossover line to get 3d points coordinate.
提出一种考虑方程组所代表几何意义的方法，利用异面直线公垂线中点去逼近物体空间点。
A model is described which consider the equation geometric meaning, make use of crossover line to get 3d points coordinate.
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