GB/T 24438.4-2024 Chinese PDF (GB /T24438.4-2024) GB/T 16702.5-2025 7-2025_Chinese: Plastics - Polyether polyols

7-2025_Chinese: Plastics - Polyether polyols for use in the production of polyurethane - Part 7: Determination of basicity (Chinese: 塑料 聚氨酯生产用聚醚多元醇 第7部分：碱性物质含量的测定)

GB/T 31126

1-2024_Chinese: Multimode optical fibres for telecommunication - Part 1: Sectional specification for category A1 multimode fibres (Chinese: 通信用多模光纤 第1部分：A1类多模光纤特性)

English versions: GB/T 22369-2024

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)

GB/T 24438.4-2024 Chinese PDF (GB /T24438.4-2024) GB/T 16702.5-2025 7-2025_Chinese: Plastics - Polyether polyolsGB T 24438. 4 2024_Chinese: Natural disaster information statistics Part 4: System of statistical forms (Chinese: 4) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 24438. 4 2024