Home / Standards / GB/T 6135.4-1996 GB/T 6135.4-1996 Straight shank twist drills — Part 4: Types and dimensions for long series straight shank twist drills 直柄麻花钻 第4部分:直柄长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