Home / Standards / GB/T 3506-2008 GB/T 3506-2008 Active Machine taps with helical flutes 螺旋槽丝锥 Standard Type GBT ICS 25.100.50 CCS J41 Status 现行 Issue Date 2008-06-03 Implementation 2009-01-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会