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English versions: GB/T 20840
GB/T 45418-2025_Chinese: General technical directives for distribution networks (Chinese: 配电网通用技术导则)
2-2024_Chinese: Fire shutter assembly - Part 2: Motor for fire shutter assembly (Chinese: 防火卷帘 第2部分：防火卷帘用卷门机)
GB/T 45573-2025_Chinese: Evaluation and measurement methods for vibration level of gas fuel combustion chambers (Chinese: 气体燃料燃烧室的振动等级评价及测量方法)
GB/T 3836.22-2023 Chinese PDF (GB/T3836.22-2023) GB/T 21461.2-2023 English versions: GB/T 20840GB T 3836. 22 2023_Chinese: Explosive atmospheres Part 22: Protection of equipment and transmission system using optical radiation (Chinese: 22) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 3836. 22 2023
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