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GB/T 3091-2025_Chinese: Welded steel pipes for low pressure fluid delivery (Chinese: 低压流体输送用焊接钢管)
classification and model compilation method for complete sets of equipment for fiber carbonization production (Chinese: 纤维碳化生产成套装备的术语、分类及型号编制方法)
English versions: GB/T 24628-2025
English versions: GB/T 45335-2025
2-2025_Chinese: Safety of transformers
GB/Z 27021.13-2025 Chinese PDF (GB /Z27021.13-2025) GB/T 7247.3-2025 GB/T 3091-2025_Chinese: Welded steel pipesGBZ27021. 13 2025_Chinese: Conformity assessment Requirements for bodies providing audit and certification of management systems Part 13: Competence requirements for auditing and certification of compliance management systems (Chinese: 13) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GBZ27021. 13 2025
