GB/T 43306-2023 Chinese PDF (GB/T43306-2023) GB/T 44950-2024 1-2023_Chinese: Railway applications - DC

1-2023_Chinese: Railway applications - DC surge arresters and voltage limiting devices - Part 1: Metal-oxide surge arresters without gaps (Chinese: 轨道交通 直流避雷器和电压限制装置 第1部分：无间隙金属氧化物避雷器)

inspection and testing

English versions: GB/T 19544-2024

GB/T 45228-2025_Chinese: Information technology - Elderly-oriented general requirement of biometric product (Chinese: 信息技术 生物特征识别产品适老化通用要求)

1-2025_Chinese: Information technology - ASN

GB/T 43306-2023 Chinese PDF (GB/T43306-2023) GB/T 44950-2024 1-2023_Chinese: Railway applications - DCGB T 43306 2023_Chinese: Gas analysis Sampling guidelines (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 43306 2023