GB/T 21290-2025 Chinese PDF (GB /T21290-2025) GB/T 20244-2025 3-2025_Chinese: Household electric direct-acting room

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)

5-2024_Chinese: Mechanical structures for electrical and electronic equipment - Outdoor enclosures - Part 3: Environmental requirements

GB/T 26841-2025_Chinese: Data items of enterprise credit files for e-commerce transaction activities (Chinese: 电子商务交易中的企业信用档案数据项)

GB/T 22247-2024_Chinese: Determination of icariin in health foods (Chinese: 保健食品中淫羊藿苷的测定)

1）第3部分：约束规范)

GB/T 21290-2025 Chinese PDF (GB /T21290-2025) GB/T 20244-2025 3-2025_Chinese: Household electric direct-acting roomGB T 21290 2025_Chinese: Frozen tilapia fillets (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 21290 2025