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TN and IT systems (Chinese: 交流1000V和直流1500V及以下低压配电系统电气安全 防护措施的试验、测量或监控设备 第11部分：TT、TN和IT系统中剩余电流监视器（RCM）的有效性)
GB/T 12279
English versions: GB/T 19598-2025
GB/T 12385-2025_Chinese: Standard test methods for sealability of gaskets for pipe flanges (Chinese: 管法兰用垫片密封性能试验方法)
1-2025_Chinese: Package of household and similar electrical appliances - Part 1: General requirements (Chinese: 家用和类似用途电器包装 第1部分：通用要求)
GB/T 20718.2-2025 English PDF (GB/T20718.2-2025) GB/T 15561-2024 TN and IT systems (Chinese:GB T 20718. 2 2025_Chinese: Road vehicles Connectors for the electrical connection of towing and towed vehicles (13 pole) Part 2: 13 pole connectors for vehicles with 12 V nominal supply voltage intended to cross water fords (Chinese: 13 2 12V13 ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 20718. 2 2025
