一种用点离基准线上(称极轴)固定点的距离和方向(角度)来表示点位置的坐标系统。
A system of coordinates in which a point is located by its distance and direction (Angle) from a fixed point on a reference line (called the polar axis).
通过移站测量来获得几个固定点的坐标位置，然后将测量结果进行处理，给出整个测量系统的测量不确定度。
By measuring the coordinate positions of a series of fixed targets from several instrument locations and calculating the measurement results, the working uncertainty of the total system will be given.
通过读取系统变量可以灵活地确定每一个轴在机床坐标系中的固定点；通过读取系统变量将PLC状态位作为NC宏程序跳转的判断条件；
Via reading system variables fixed point of axes can be determined in machine coordinates system: Via reading system variables PLC state bit is condition of criterion as NC macro-program goto;
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