NA 152
DIN Standards Committee Technical Fundamentals
Standards
[Withdrawn]
ISO 9177-3
ISO 9177-3
Mechanical pencils - Part 3: Black leads - Bending strengths of HB leads
Title (German)
Füllstifte - Teil 3: Graphitminen; Biegefestigkeit von HB-Minen
Responsible national committee
NA 152-06 FBR - Steering Committee of Section Technical Product Documentation