ISO 9177:2022
ISO 9177:2022 Mechanical pencils for technical drawings – Part 3: Black leads – Bending strengths of HB leads
CDN $76.00
Description
This document specifies bending strengths and a test method for black leads of HB hardness degree used for mechanical pencils for technical drawings.
Edition
2
Published Date
2022-01-26
Status
PUBLISHED
Pages
4
Language
English
Format
Secure PDF
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Abstract
This document specifies bending strengths and a test method for black leads of HB hardness degree used for mechanical pencils for technical drawings.
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