GB/T 20340.1-2024 Chinese PDF (GB/T20340.1-2024) GB/T 19267.1-2023 supplied electronic step-down convertors for

supplied electronic step-down convertors for filament lamps (Chinese: 光源控制装置 第2-2部分：钨丝灯用直流/交流电子降压转换器的特殊要求)

English versions: GB/T 45362-2025

English versions: GB/T 22322

GB/T 45562-2025_Chinese: Heavy mechanical - Design specifications for automation system (Chinese: 重型机械 自动化系统设计规范)

4-2025_Chinese: Information technology - Building information model(BIM) software - Part 4: Mesh model (Chinese: 信息技术 建筑信息模型（BIM）软件 第4部分：网格模型)

GB/T 20340.1-2024 Chinese PDF (GB/T20340.1-2024) GB/T 19267.1-2023 supplied electronic step-down convertors forGB T 20340. 1 2024_Chinese: Agricultural trailers and trailed equipment Drawbar jacks Part 1: Design safety, test methods and acceptance criteria (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 20340. 1 2024