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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
標(biāo)準(zhǔn)編號(hào): GB/T 6138.1-2007
標(biāo)準(zhǔn)類別:Standard
出版單位:Standardization Administration of China
標(biāo)準(zhǔn)頁(yè)數(shù):8
本標(biāo)準(zhǔn)替代的舊標(biāo)準(zhǔn)
等同采用的國(guó)際標(biāo)準(zhǔn)
ISO 3439:2003 - Modified