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