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GB/T 22919
English versions: GB/T 3091-2025
4-2024_Chinese: Communication networks and systems for power utility automation - Part 4: System and project management (Chinese: 电力自动化通信网络和系统 第4部分：系统和项目管理)
English versions: GB/T 31114-2024
English versions: GB 4343
GB/T 43321-2023 Chinese PDF (GB/T43321-2023) GB/T 20405.2-2024 GB/T 22919GB T 43321 2023_Chinese: Recommended brazing procedure specification for copper and copper alloys (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 43321 2023
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