Home / Standards / GB/T 4249-2018 GB/T 4249-2018 Active Geometrical product specifications(GPS)—Fundamentals—Concepts, principles and rules 产品几何技术规范(GPS) 基础 概念、原则和规则 Standard Type GBT ICS 01.100.20 CCS J04 Status 现行 Issue Date 2018-09-17 Implementation 2019-04-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委