Home / Standards / GB/T 43550.2-2023 GB/T 43550.2-2023 Active Mechanical pencils and leads for general use—Classification, dimensions, quality and test methods—Part 2: Black leads 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 Standard Type GBT ICS 97.180 CCS Y50 Status 现行 Issue Date 2023-12-28 Implementation 2023-12-28 Responsible Dept 中国轻工业联合会 Drafting Unit N/A