ISO 9177-2:2022 制图自动铅笔 第2部分：石墨 分类和尺寸

标准编号：ISO 9177-2:2022

中文名称：制图自动铅笔 第2部分：石墨 分类和尺寸

英文名称：Mechanical pencils for technical drawings — Part 2: Black leads — Classification and dimensions

发布日期：2022-06

标准范围

This document specifies a classification and dimensions for black leads used for mechanical pencils for technical drawings.
Two types of black leads are available:
— polymer leads (designated by the letter “P”);
— ceramic leads (designated by the letter “C”).

标准预览图