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China Subland twist drills GB Standards Search Result

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GB/T 6139-2007
Subland twist drills - Technical specifications
阶梯麻花钻 技术条件 - 中英文版
GB/T 6138.2-2007
Subland twist drills for holes prior to tapping screw threads - Part 2: The types and dimensions of Subland twist drills with Morse typer shanks
攻丝前钻孔用阶梯麻花钻 第2部分:莫氏锥柄阶梯麻花钻的型式和尺寸 - 中英文版
GB/T 6138.1-2007
Subland twist drills for holes prior to tapping screw threads - Part 1: The types and dimensions of subland twist drills with cylindrical shanks
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 - 中英文版

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