GB/T 5169.49-2024 Chinese PDF (GB/T5169.49-2024) GB 21456-2024 GB/T 19544-2024_Chinese: Classification and general

GB/T 19544-2024_Chinese: Classification and general technology requirements of spinal orthoses (Chinese: 脊柱矫形器的分类及通用技术条件)

GB/T 22330

171-2024_Chinese: Ergonomics of human-system interaction - Part 171: Guidance on software accessible design (Chinese: 人-系统交互工效学 第171部分：软件无障碍设计指南)

1-2024_Chinese: Fire shutter assembly - Part 1: General technical specification (Chinese: 防火卷帘 第1部分：通用技术条件)

GB/T 45455-2025_Chinese: Tools for moulding - Guide bushes

GB/T 5169.49-2024 Chinese PDF (GB/T5169.49-2024) GB 21456-2024 GB/T 19544-2024_Chinese: Classification and generalGB T 5169. 49 2024_Chinese: Fire hazard testing for electric and electronic products Part 49: Arc test method Arc ignition test method for materials (Chinese: 49 ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 5169. 49 2024