Home / Standards / GB/T 40121-2021 GB/T 40121-2021 Active Technical product documentation—Representation of product residual stress symbol 技术产品文件 产品残余应力符号表示法 Standard Type GBT ICS 01.110 CCS J04 Status 现行 Issue Date 2021-05-21 Implementation 2021-09-01 Responsible Dept 国家标准委 Drafting Unit N/A