GB/T 39542.3-2025

Active

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

技术制图活动铅笔 第3部分：黑铅芯 HB铅芯弯曲强度

Standard Type
GBT
ICS
97.180
CCS
Y50
Status
现行
Issue Date
2025-05-30
Implementation
2025-05-30
Responsible Dept
中国轻工业联合会
Drafting Unit
N/A