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11-2023_Chinese: Methods for chemical analysis of tin - Part 11: Determination of copper
English versions: GB/T 44970-2024
English versions: GB/T 20195-2024
GBZ45064-2024_Chinese: Equipment for general lighting purposes - Stroboscopic effects - Objective test method (Chinese: 普通照明用设备 频闪效应 客观试验方法)
GB/T 21649
GB/T 39075.1-2023 Chinese PDF (GB/T39075.1-2023) GB/T 21267-2024 11-2023_Chinese: Methods for chemical analysisGB T 39075. 1 2023_Chinese: Organic light emitting diode(OLED)light sources for general lighting Safety Part 1: General requirements and tests (Chinese: OLED 1) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 39075. 1 2023
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