China National Standards

China 4：Process GB Standards List

  •  China "4：Process" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 41158.4-2022 Three-dimensional process planning for mechanical products—Part 4：Process symbol and annotation
    机械产品三维工艺设计 第4部分：工艺符号与标注    		 China National Standards
    4：Process
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