Home / Standards / GB/T 38903-2020 GB/T 38903-2020 Active Technical guideline for material flow analysis of industrial parks 工业园区物质流分析技术导则 Standard Type GBT ICS 13.020.10 CCS Z04 Status 现行 Issue Date 2020-06-02 Implementation 2021-01-01 Responsible Dept 国家标准委 Drafting Unit N/A