Home / Standards / GB/T 20326-2021 GB/T 20326-2021 Active Long full-diameter shank taps with recess 粗长柄机用丝锥 Standard Type GBT ICS 25.100.50 CCS J41 Status 现行 Issue Date 2021-08-20 Implementation 2022-03-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A