GB/T 45412.1-2025 Chinese PDF (GB /T45412.1-2025) GB/T 45140-2025 English versions: GB/T 33523

English versions: GB/T 33523

72-2024_Chinese: Communication networks and systems for power utility automation - Part 7-2: Basic information and communication structure - Abstract communication service interface(ACSI) (Chinese: 电力自动化通信网络和系统 第7-2部分：基本信息和通信结构 抽象通信服务接口（ACSI）)

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)

English versions: GB/T 45475

GB/T 45412.1-2025 Chinese PDF (GB /T45412.1-2025) GB/T 45140-2025 English versions: GB/T 33523GB T 45412. 1 2025_Chinese: Optics and photonics Specifications for binoculars, monoculars and spotting scopes Part 1: General purpose instruments (Chinese: 1) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 45412. 1 2025