Home / Standards / GB/T 38929-2020 GB/T 38929-2020 Active General requirements of mirror milling process for civil aircraft skin parts 民用飞机蒙皮镜像铣削工艺通用要求 Standard Type GBT ICS 49.040 CCS V18 Status 现行 Issue Date 2020-06-02 Implementation 2021-01-01 Responsible Dept 国家标准委 Drafting Unit N/A