GB/T 20042.5-2024 Chinese PDF (GB /T20042.5-2024) GB 31604.30-2025 English versions: GB/T 17145-2024

English versions: GB/T 17145-2024

2-2025_Chinese: Household electric direct-acting room heaters - Methods for measuring performance - Part 2: Additional provisions for the measurement of the radiant factor (Chinese: 家用直接作用式房间电加热器 性能测试方法 第2部分：辐射系数测量的附加规定)

GB 45185-2024_Chinese: Optometry products - Safety technical specifications of finished spectacles (Chinese: 眼视光产品 成品眼镜安全技术规范)

GB/T 10810

36-2024_Chinese: Electromagnetic compatibility - Testing and measurement techniques - Part 36: Intentional electromagnetic interference immunity test methods for equipment and systems (Chinese: 电磁兼容 试验和测量技术 第36部分：设备和系统的有意电磁干扰抗扰度试验方法)

GB/T 20042.5-2024 Chinese PDF (GB /T20042.5-2024) GB 31604.30-2025 English versions: GB/T 17145-2024GB T 20042. 5 2024_Chinese: Proton exchange membrane fuel cell Part 5: Test method for membrane electrode assembly (Chinese: 5) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 20042. 5 2024