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English versions: GB 26386-2025
4-2025_Chinese: Test methods of rare earth phosphors for LED - Part 4: Determination of high temperature and high humidity property (Chinese: LED用稀土荧光粉试验方法 第4部分：高温高湿性能的测定)
2-2024_Chinese: Non-destructive testing - Penetrant testing - Part 2: Testing of penetrang materials (Chinese: 无损检测 渗透检测 第2部分：渗透材料的检验)
English versions: GB/T 18462-2025
GB/T 28583-2025 Chinese PDF (GB /T28583-2025) GB 6944-2025 English versions: GB 26386-2025GB T 28583 2025_Chinese: Specification of electricity supply service (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 28583 2025
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