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对以实现实物传递为主的邮政企业来说，车辆的质量和技术水平是衡量邮政企业自主化及现代化水平的重要标志之一，更是影响邮政企业各项经济技术指标的重要因素。 近年来，随着技术进步速度的加快，车辆更新的速度也相应加快。为了促进技术进步和提高经济效益，各级邮政企业需要
For the postal enterprises, which mainly rely on the physical delivery, the quality and technical level of the vehicles are one of the most important indicators to measure the level of autonomy and modernization of postal enterprises. They are also an important factor that affects various economic and technical indicators of the postal enterprises. In recent years, with the acceleration of technological progress, the speed of vehicle renewal has correspondingly accelerated. In order to promote technological progress and improve economic efficiency, postal enterprises at all levels need