It is an important reason to affect the accuracy of railroadengineering design estimate whether the bill of quantities calculation of all specialties is accurate.
影响铁路工程设计概算准确性的一个重要原因，就是各专业的工程量计算是否准确。
2
Nowadays, in mountain railroadengineering survey, the efficiency of traditional leveling method is low, is very difficult to practice because of terrain undulation being big.
目前在山区铁路工程测量过程中，由于地形起伏较大，传统的水准测量效率低，非常难以实施。
3
Develops a CAD system for type 25 series railroad cars, with the system, we can automatically carry out scheme design, technical design, working drawing design and engineering database management.