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English versions: GB/T 4137-2024
English versions: GB/T 13460-2025
GB/T 44115
English versions: GB 29140-2024
GB/T 27728
GB/T 24339-2023 Chinese PDF (GB/T24339-2023) GB/T 4447-2025 English versions: GB/T 4137-2024GB T 24339 2023_Chinese: Railway applications Communication, signalling and processing systems Safety related communication in transmission systems (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 24339 2023
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