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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 39542.1-2020 |
Mechanical pencils for technical drawings—Part 1: Classification, dimensions, performance requirements and testing 技术制图活动铅笔 第1部分：分类、尺寸、性能要求和试验 |
China National Standards Technical drawings Requirements |
 English PDF |
| GB/T 10609.4-2009 |
Technical drawings - Requirements for microcopying 技术制图 对缩微复制原件的要求 |
China National Standards Technical drawings Requirements |
English PDF |
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