系统用于发动机尾气的集中净化处理，降低尾气中碳氢化合物、氮氧化物、一氧化碳及颗粒物的含量，满足国家大气污染物综合排放标准。

The system used for purifying exhaust gas, reduce the content of exhaust hydrocarbons, nitrogen oxides, carbon monoxide and particulates, Meet the requirements of Chinese regulation.