Home / Standards / GB/T 20308-2020 GB/T 20308-2020 Active Geometrical product specifications(GPS)—Matrix model 产品几何技术规范(GPS) 矩阵模型 Standard Type GBT ICS 17.040.40 CCS J04 Status 现行 Issue Date 2020-04-28 Implementation 2020-11-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委