整体硬质合金直柄麻花钻 第1部分：直柄麻花钻型式与尺寸
Solid carbide twist drills with parallel shank Part1: The types and dimensions for parallel shank twist drills
2010-12-23
GB/T 25667.2-2010
整体硬质合金直柄麻花钻 第2部分：2°斜削平直柄麻花钻型式与尺寸
Solid carbide twist drills with parallel shank Part2: The types and dimensions for parallel shank twist drills with 2°anguar fiants