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sklademVydáno: 1994
ISO 9177-3
Mechanical pencils — Part 3: Black leads — Bending strengths of HB leads
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| Označení normy: | ISO 9177-3 |
| Počet stran: | 3 |
| Vydání: | 1 |
| Vydáno: | 1994 |
DESCRIPTION
ISO 9177-3
Specifies bending strengths and a test method for black leads of HB hardness degree used for mechanical pencils for technical drawings.