GB/T 21711.2-2024 Chinese PDF (GB/T21711.2-2024) GB/T 16702.3-2025 English versions: GB/T 17969

English versions: GB/T 17969

GB/T 45528-2025_Chinese: Nanotechnology - Measurement of pore size and pore size distribution of nanoporous materials - Fluorescence probe method (Chinese: 纳米技术 纳米多孔材料孔径及孔径分布测试 荧光探针法)

nickel alloys and cobalt alloys investment castings - Visual testing of surface quality (Chinese: 熔模铸钢件、镍合金铸件和钴合金铸件 表面质量目视检测方法)

GB/T 45445-2025_Chinese: General requirements for age-friendly E-commerce platform (Chinese: 电子商务平台适老化通用要求)

GB/T 21711.2-2024 Chinese PDF (GB/T21711.2-2024) GB/T 16702.3-2025 English versions: GB/T 17969GB T 21711. 2 2024_Chinese: Electromechanical elementary relays Part 2: Reliability (Chinese: 2) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 21711. 2 2024