Home / Standards / GB/T 38987-2020 GB/T 38987-2020 Active Cemented carbide rods with helical coolant holes 硬质合金螺旋孔棒材 Standard Type GBT ICS 77.160 CCS H72 Status 现行 Issue Date 2020-07-21 Implementation 2021-06-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A