GB/T 6135.1-2008 Parallel shank twist drills.Part 1: The types and dimensions for small type twist drills with oversize parallel shank (English Version)
This part of GB/T 6135 specifies the type and size of small twist drills with thick straight shanks. This Part is applicable to small twist drills with thick straight shanks with a diameter of 0.10 mm to 0.35 mm.
GB/T 6135.1-2008 history
2008GB/T 6135.1-2008 Parallel shank twist drills.Part 1: The types and dimensions for small type twist drills with oversize parallel shank
1996GB/T 6135.1-1996 Parallel shank twist drills--Part 1: The types and dimensions for small type twist drills with oversize parallel shank