China 'GB/T 43550.2-2023
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 43550.2-2023
Mechanical pencils and lead for general use - Classification, dimensions, quality and test methods - Part 2: Black lead 一般用途活动铅笔和铅芯 分类、尺寸、质量和试验方法 第2部分:黑铅芯
Issued Date:2023.12.28
Implemented Date:2023.12.28
Issued by:
The Standardization Administration of the People's Republic of China