GB 16174.2-2024 Chinese PDF GB/T 45217-2025 GB/T 21551

GB/T 21551

GB/T 18737

4-2025_Chinese: Acoustics - Laboratory measurement of sound insulation of building elements - Part 4: Measurement procedures and requirements (Chinese: 声学 建筑构件隔声的实验室测量 第4部分：测量程序和要求)

2-2025_Chinese: IPv4/IPv6 network security protection technical specifications - Part 2: Mobile communication network (Chinese: IPv4/IPv6网络安全防护技术规范 第2部分：移动通信网)

72-2024_Chinese: Communication networks and systems for power utility automation - Part 7-2: Basic information and communication structure - Abstract communication service interface(ACSI) (Chinese: 电力自动化通信网络和系统 第7-2部分：基本信息和通信结构 抽象通信服务接口（ACSI）)

GB 16174.2-2024 Chinese PDF GB/T 45217-2025 GB/T 21551GB 16174. 2 2024_Chinese: Implants for surgery Active implantable medical devices Part 2: Cardiac pacemakers (Chinese: 2) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB 16174. 2 2024