GB/T 21099.4-2024 Chinese PDF (GB /T21099.4-2024) GB/T 20236-2025 English versions: GB/T 22453-2025

English versions: GB/T 22453-2025

3-2025_Chinese: Household electric direct-acting room heaters - Methods for measuring performance - Part 3: Additional provisions for the measurement of the radiation efficiency (Chinese: 家用直接作用式房间电加热器 性能测试方法 第3部分：辐射效率测量的附加规定)

5-2025_Chinese: Design specification for mechanical components in nuclear island of pressurized water reactor nuclear power plants - Part 5: Small components (Chinese: 压水堆核电厂核岛机械设备设计规范 第5部分：小型设备)

GB/T 20243

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 21099.4-2024 Chinese PDF (GB /T21099.4-2024) GB/T 20236-2025 English versions: GB/T 22453-2025GB T 21099. 4 2024_Chinese: Devices and integration in enterprise systems Function blocks(FB) for process control and electronic device description language(EDDL) Part 4: EDD interpretation (Chinese: FBEDDL 4EDD) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 21099. 4 2024