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ISO 9177-3:1994
M00009814
New product
ISO 9177-3:1994 Mechanical pencils -- Part 3: Black leads -- Bending strengths of HB leads
standard by International Organization for Standardization, 07/01/1994
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Full Description
Specifies bending strengths and a test method for black leads of HB hardness degree used for mechanical pencils for technical drawings.