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>ISO 9177-3:2022 - Mechanical pencils for technical drawings — Part 3: Black leads — Bending strengths of HB leads
sklademVydáno: 2022-01-26
ISO 9177-3:2022 - Mechanical pencils for technical drawings — Part 3: Black leads — Bending strengths of HB leads

ISO 9177-3:2022

ISO 9177-3:2022 - Mechanical pencils for technical drawings — Part 3: Black leads — Bending strengths of HB leads

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Označení normy:ISO 9177-3:2022
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Vydáno:2022-01-26
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ISO 9177-3:2022

This document specifies bending strengths and a test method for black leads of HB hardness degree used for mechanical pencils for technical drawings.