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GB/T 12417
GB/T 28029
English versions: GB/T 30553-2023
3-2024_Chinese: Electronic data interchange for administration
English versions: GB/T 45552-2025
GB/T 31308.4-2023 Chinese PDF (GB/T31308.4-2023) GB/T 41850.1-2024 GB/T 12417GB T 31308. 4 2023_Chinese: Processes, data elements and documents in commerce, industry and administration Long term signature Part 4: Attributes pointing to proof of existence objects used in long term signature formats (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 31308. 4 2023
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