GB/T 39542.3-2020

Mechanical pencils for technical drawings—Part 3: Black leads—Bending strengths of HB leads

STANDARD published on 21.7.2020

English, Chinese -
electronic design (pdf) (142.50 USD)

The information about the standard:

Designation standards: GB/T 39542.3-2020
Note: WITHDRAWN
Publication date standards: 21.7.2020
Country: Chinese technical standard
Category: Technical standards GB