Home / Standards / GB/T 20955-2007 GB/T 20955-2007 Active Metal cutting tools - Terms in Taps 金属切削刀具 丝锥术语 Standard Type GBT ICS 25.100.50 CCS J41 Status 现行 Issue Date 2007-06-25 Implementation 2007-11-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A