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English versions: GB/T 15316-2024
English versions: GB/T 45206-2025
GB/T 45281-2025_Chinese: Technical requirements for multimedia information processing for the visually impaired person (Chinese: 盲用多媒体信息处理技术要求)
phenolphthalein alkalinity
English versions: GB/T 18655-2025
GB/T 28892-2024 Chinese PDF (GB/T28892-2024) GB/T 45282-2025 English versions: GB/T 15316-2024GB T 28892 2024_Chinese: Surface chemical analysis X ray photoelectron spectroscopy Description of selected instrumental performance parameters (Chinese: X ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 28892 2024
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