Home / Standards / GBT 24637.1-2020 GBT 24637.1-2020 Geometrical product specifications — General concepts — Part 1: Model for geometrical specification and verification 产品几何技术规范 通用概念 第1部分：几何规范和检验的模型 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