GB/T 39542.3-2020 Mechanical pencils for technical drawings-Part 3: Black leads-Bending strengths of HB leads

Standard Number: GB/T 39542.3-2020
Chinese:技术制图活动铅笔 第3部分：黑铅芯 HB铅芯弯曲强度
English:Mechanical pencils for technical drawings-Part 3: Black leads-Bending strengths of HB leads

Effective Date:2020-07-21
Regulatory Authority:China Light Industry Federation
Issuing Regulatory Authority:State Administration for Market Supervision and Administration,National Standardization Administration of China

Adheres to international standards:Y
PDF Downloadable:N

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