Home / Standards / GB/T 20333-2023 GB/T 20333-2023 Active Taps for parallel and taper pipe threads general dimensions and marking 圆柱和圆锥管螺纹丝锥的基本尺寸和标志 Standard Type GBT ICS 25.100.50 CCS J41 Status 现行 Issue Date 2023-05-23 Implementation 2023-12-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A