Home / Standards / GBT 24631.1-2009 GBT 24631.1-2009 Geometrical product specifications — Straightness — Part 1: Vocabulary and parameters 产品几何技术规范 直线度 第1部分:词汇和参数 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