General Specification for 1/8 Inch Diameter Shank Carbide Drills for Printed Boards
印制板用1/8英寸直径硬质合金柄钻通用规范
发布日期:
1994-04-01
为印制板制造中使用的带有四个刻面钻尖的实心硬质合金麻花钻的术语和要求制定定义。
Establishes definitions for terms and requirements for solid carbide twist drills with four-faceted drill points used in the fabrication of printed boards.