GB 16174.2-2024 Chinese PDF GB/T 45217-2025 4-2025_Chinese: Acoustics - Laboratory measurement

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)

GB/T 45140-2025_Chinese: Technical guideline for monitoring and effectiveness evaluation of mangrove ecological restoration (Chinese: 红树林生态修复监测和效果评估技术指南)

English versions: GB 21343-2023

1-2024_Chinese: Variable-frequency drive above 1 kV and not exceeding 35 kV - Part 1: Technical conditions (Chinese: 1 kV以上不超过35 kV的通用变频调速设备 第1部分：技术条件)

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)

GB 16174.2-2024 Chinese PDF GB/T 45217-2025 4-2025_Chinese: Acoustics - Laboratory measurementGB 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