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download between 0-24 hoursReleased: 2022
ISO 9177-2:2022
ISO 9177-2:2022-Mechanical pencils for technical drawings-Part 2: Black leads — Classification and dimensions
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| Standard´s number: | ISO 9177-2:2022 |
| Pages: | 4 |
| Edition: | 2 |
| Released: | 2022 |
| Language: | English |
DESCRIPTION
ISO 9177-2:2022
This document specifies a classification and dimensions for black leads used for mechanical pencils for technical drawings. Two types of black leads are available: — polymer leads (designated by the letter “P”); — ceramic leads (designated by the letter “C”).