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4-2025_Chinese: Design specification for mechanical components in nuclear island of pressurized water reactor nuclear power plants - Part 4: Class 3 components (Chinese: 压水堆核电厂核岛机械设备设计规范 第4部分：3级设备)
GB/T 21510-2024_Chinese: Antimicrobial property testing and evaluation methods for nano-inorganic materials (Chinese: 纳米无机材料抗菌性能检测方法及评价)
English versions: GB 19302-2025
English versions: GB/T 45037-2024
GB/T 13815
GB/T 20656-2023 Chinese PDF (GB/T20656-2023) GB/T 17446-2024 4-2025_Chinese: Design specification for mechanicalGB T 20656 2023_Chinese: Petroleum and natural gas industries Field inspection of new casing, tubing and drill pipe (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 20656 2023
