GB/T 21220-2024 Chinese PDF (GB/T21220-2024) GB/T 15561-2024 GB/T 45164-2024_Chinese: Classification and designation

GB/T 45164-2024_Chinese: Classification and designation of defects in investment castings (Chinese: 熔模铸件缺陷分类及命名)

4-2025_Chinese: Automation systems and integration - Digital twin framework for manufacturing - Part 4: Information exchange (Chinese: 自动化系统与集成 面向制造的数字孪生框架 第4部分：信息交换)

GB/T 40711

GB/T 45458-2025_Chinese: Method for determination of trace elements in attapulgite (Chinese: 凹凸棒石微量元素测定方法)

GB/T 21220-2024 Chinese PDF (GB/T21220-2024) GB/T 15561-2024 GB/T 45164-2024_Chinese: Classification and designationGB T 21220 2024_Chinese: Soft magnetic metallic materials (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 21220 2024