Home / Standards / GB/T 39291-2020 GB/T 39291-2020 Active Test method for impact wear properties of studs 鞋钉冲击磨损性能试验方法 Standard Type GBT ICS 61.060 CCS Y78 Status 现行 Issue Date 2020-11-19 Implementation 2021-10-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A