Home / Standards / GB/T 20333-2006 GB/T 20333-2006 Abolished 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 废止 Issue Date 2006-07-20 Implementation 2007-01-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A