1化学原料及化学制品制造企业主体长期信用评级方法目录一、适用范围..............................................................................................................3二、评级思路和评级框架..........................................................................................3三、业务发展状况评估要素分析..............................................................................5（一）外部运营环境..................................................................................................71.宏观环境...............................................................................................................72.行业环境.......................