
Subland twist drills for holes prior to tapping screw threads ? Part 1:The types and dimensions of subland twist drills with cylindrical shanks
出版:Standardization Administration of China

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基本信息
标准编号: GB/T 6138.1-2007
标准类别:Standard
出版单位:Standardization Administration of China
标准页数:8
本标准替代的旧标准
等同采用的国际标准
ISO 3439:2003 - Modified