Home / Standards / GB/T 6135.2-2008 GB/T 6135.2-2008 Active Parallel shank twist drills - Part 2: The types and dimensions for parallel shank stub series twisl drills and parallel shank jobber series twist drills 直柄麻花钻 第2部分：直柄短麻花钻和直柄麻花钻的型式和尺寸 Standard Type GBT ICS 25.100.30 CCS J41 Status 现行 Issue Date 2008-11-04 Implementation 2009-04-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会