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GB/T 45109.1-2024 Chinese PDF (GB /T45109.1-2024) GB 15269-2025 English versions: GB/T 45031-2024GB T 45109. 1 2024_Chinese: Smart city City digital twin Part 1: Technical reference architecture (Chinese: 1) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 45109. 1 2024
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