China National Standards

China leads—Bending GB Standards List

  •  China "leads—Bending" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 39542.3-2020 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    		 China National Standards
    leads—Bending
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