攻丝前钻孔用阶梯麻花钻 第1部分：直柄阶梯麻花钻的型式和尺寸
Subland twist drills for holes prior to tapping screw threads--Part 1:The types and dimensions for subland twist drills with parallel shanks
标准状态
发布于：1997-08-28
实施于：1998-06-01
已废止
基本信息
内容预览
Subland twist drills for holes prior to tapping screw threads--Part 1:The types and dimensions for subland twist drills with parallel shanks