ISO 9177-2:2022
技术制图用机械铅笔第2部分:黑线笔分类和尺寸

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


ISO 9177-2:2022

标准号
ISO 9177-2:2022
发布
2022年
发布单位
国际标准化组织
当前最新
ISO 9177-2:2022
 
 
引用标准
ISO 128-2 ISO 9177-1
适用范围
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”).

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