GB/T 39542.3-2020

Abolished

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
废止
Issue Date
2020-07-21
Implementation
2020-07-21
Responsible Dept
中国轻工业联合会
Drafting Unit
N/A