Home / Standards / GB/T 6135.2-1996 GB/T 6135.2-1996 Parallel shank twist drills — Part 2: Types and dimensions for parallel shank short twist drills 直柄麻花钻 第2部分:直柄短麻花钻的型式和尺寸 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A