GB/T 20330-2006
攻丝前钻孔用麻花钻直径
Drill diameter for use prior to tapping screw threads
- 实施日期
- 2007-01-01
- ICS 分类
- 25.100.30
组合使用关键词、标准类型、状态与 ICS 分类,快速定位所需国家标准。
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GB/T 20330-2006
Drill diameter for use prior to tapping screw threads
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