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MS ISO 9177-3:2003 (CONFIRMED:2012)
Mechanical pencils - Part 3: black leads - bending strengths of HB leads (ISO 9177-3:1994, IDT)
This part of ISO 9177 specifies bending strengths and a test method for black leads of HB hardness degree used for mechanical pencils for technical drawings.
1st Confirmation
N/A
PDF
01/08/2019
12
NSC 06 - Mechanical Engineering
97.180
15.00