Home / Standards / GBT 13319-2020 GBT 13319-2020 Geometrical product specifications — Geometrical tolerancing — Grouped and combined geometrical specifications 产品几何技术规范 几何公差 成组与组合几何规范 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A