GB/T 17643-2025 Chinese PDF (GB /T17643-2025) GB/T 1406.3-2025 4-2025_Chinese: Design specification for mechanical

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)

English versions: GB/T 17643-2025

validation and maintenance of a sterilization process (Chinese: 医疗产品灭菌 微生物学方法 第2部分：用于灭菌过程的定义、确认和维护的无菌试验)

GB/T 20405

English versions: GB/T 18912-2024

GB/T 17643-2025 Chinese PDF (GB /T17643-2025) GB/T 1406.3-2025 4-2025_Chinese: Design specification for mechanicalGB T 17643 2025_Chinese: Geosynthetics Polyethylene geomembrane (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 17643 2025