The system is running smoothly with large through-putvolume, easy to operate. Advanced programming design with various control modes, react to different situations freely;
系统运转自如，操作简单易行，人员通过量大；程序设计先进，具有多种操控模式，从容应对各种进出情况；
2
Through research on the present numeration of national economic benefits, a problem in traffic volume analysis is put forward by traffic assignment theory.