China National Standards

China leads—Classification GB Standards List

  •  China "leads—Classification" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 39542.2-2020 Mechanical pencils for technical drawings—Part 2: Black leads—Classification and dimensions
    技术制图活动铅笔 第2部分：黑铅芯 分类和尺寸    		 China National Standards
    leads—Classification
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