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English versions: GB/T 21551
13-2025_Chinese: Electronic railway equipment - Train communication network (TCN) - Part 4-1: The test method of train communication network based on Wire Train Bus(WTB) (Chinese: 轨道交通电子设备 列车通信网络（TCN) 第4-1部分：基于绞线式列车总线（WTB）的列车通信网络试验方法)
GB/T 10859
English versions: GB/T 2684-2025
English versions: GB/T 18964
GB/T 30565-2025 Chinese PDF (GB /T30565-2025) GB/T 20424-2025 English versions: GB/T 21551GB T 30565 2025_Chinese: Non destructive testing Eddy current testing General principles (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 30565 2025
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